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7th grade part 2 km

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# 7th grade part 2 km

### Algebraic reasoning, rationals, proportionality, geometry, measurement

Question | Answer |
---|---|

An _____ is a mathematical sentence using numbers and variables where both sides are equal. | equation |

A _____ is a symbol (letter) used to represent a number in mathematical expression/equation. | variable |

A _____ is the number in front of the variable. | coefficient |

An equation can be changed and remains equal only when the same operation is done to _____ . | both sides |

To _____ means to find the value of the variable that makes the statement true. | solve an equation |

_____ are opposite mathematical operations (one operation undoes the other). | Inverse operations |

_____ is the inverse operation for addition. | Subtraction |

_____ is the inverse operation for multiplication. | Division |

A _____ is a group of objects that have a common attribute. | set |

_____ are numbers that can be written as a fraction. | Rational numbers |

The _____ of a fraction is the number being considered out of a whole. It is on the top when written in division form. | numerator |

The _____ of a fraction is the total number being used to compare (whole). It is on the bottom when written in division form. | denominator |

A _____ is a number that has a whole number part and a fraction part. | mixed number |

An ______ is a fraction whose numerator is greater than or equal to its denominator. | improper fraction |

When _____ : you must first have a common denominator, perform the operation on the numerator and keep the denominator the same. | adding and subtracting fractions |

When ______ ; you do not need common denominators, multiply the numerators, multiply the denominators and simplify when possible. | multiplying fractions |

When _____ : Keep the first fraction the same, change the sign to multiply, do the reciprocal of the 2nd fraction then multiply as normal. (keep, change, flip) | dividing fractions |

A _____ is a common multiple of all the denominators in the problem. | common denominator |

The _____ of a fraction is that fraction flipped over. | reciprocal |

To add or subtract decimals, line up the _____ , then add or subtract. | decimals vertically |

To multiply decimals, line up the _____ from the right and multiply. | numbers vertically |

To place the decimal in the answer of a multiplication decimals problem, count the number of digits to the _____ of the decimal in the numbers multiplied. The answer should have that many digits to the _____ of the decimal. | right |

When dividing a decimal by a whole number, move the decimal _____ then divide. | straight up |

When dividing a decimal by a _____, move the decimal on the outside to the far right, then move the decimal inside to the right the same number of places and then move straight up and divide. | decimal |

_____ is the number of items per unit. | Unit rate |

A _____ is the comparision of two numbers that can be written three ways. | ratio |

To change a _____ divide the numerator by the denominator. | fraction to a decimal |

To change a _____ put the decimal over the place value. | decimal to a fraction |

To change _____ move the decimal point two places to the right. | decimal to percent |

To change _____ move the decimal point two places to the left. | percent to decimal |

A _____ is when two ratios are equal. | proportional relationship |

When setting up a proportion, _____ . | labels much match |

To solve a proportion, _____ . | cross multiply and divide |

A situation has proportionality if, starting at zero, there is a _____ . | constant rate of change |

_____ is the part out of 100. | Percent |

The _____ is the number the original is multiplied by. | scale factor |

An _____ is a geometric figure made up of two rays or line segments that have the same end point. | angle |

The point where the two rays meet in an angle is a _____ . | vertex |

A _____ measures exactly 90 degrees. | right angle |

A ______ measures exactly 180 degrees. | straight angle |

An _____ measures less than 90 degrees. | acute angle |

An _____ measures between 90 and 180 degrees. | obtuse angle |

Two angles are _____ if the sum of their measures is 90 degrees. | complementary |

Two angles are _____ if the sum of their measures is 180 degrees. | supplementary |

_____ angles/sides are located in the same position on similar shapes. | Corresponding |

Two figures are _____ if they have the same shape and proportional size. | similar |

Two figures are _____ if they have the same shape and size. | congruent |

A ______ triangle is a triangle that has no sides congruent. | scalene |

An _____ triangle is a triangle that has at least two sides congruent. | isosceles |

An _____ triangle is a triangle that has all three sides congruent. | equilateral |

A ______ is a quadrilateral with opposite sides parallel and opposite sides congruent. | parallelogram |

A ______ is a parallelogram with four right angles. | rectangle |

A _____ is a parallelogram with four contruent sides. | rhombus |

A _____ is a parallelogram with four right angles and four right sides. | square |

A _____ is a quadrilateral with exactly one set of parallel sides. | trapeziod |

_____ is a mirror image across a line of symmetry. | Reflection |

______ is the sliding of a figure without changing size or direction. | Translation |

The _____ of an object are the measurements of its edges. | dimensions |

_____ is the distance around a geometric figure or the sum of all its sides. | Perimeter |

The perimeter of a circle is called ______ . | circumference |

On a circle, the _____ is the distance from the center to any point on the circle. | radius |

The _____ is the distance across a circle through its center. | diameter |

The diameter of a circle is _____ as its radius. | twice as long |

__ is used with circle formulas and equals 3.14 or 22/7. | Pi |

_____ of a figure is the number of square units needed to cover its surface. It is labeled in square units. | Area |

The _____ of a figure is the perpendicular distance from its base to the opposite side. | height |

The formula for the _____ is the product of one half its base times its height. A=(b*h)/2 | area of a triangle |

The _____ is found using the formula: A=pi(r)squared. | area of a circle |

A _____ is a three dimensional object having parallel and congruent bases. | prism |

A _____ is a solid that has one base and triangular faces that meet in a point. | pyramid |

A _____ is the point where the edges of a solid meet. | vertex |

A _____ is a flat surface on a three dimensional shape. | face |

An _____ is where two faces connect on a three dimensional shape. | edge |

A _____ is a two-dimensional representation of a solid. | net |

_____ is the total area of all faces. | Surface area |

The _____ is the bottom that is congruent to the top. | base of a three dimensional prism |

_____ is the number of cubic units needed to fill the space occupied by a solid. | Volume |

Volume is measured and labeled in _____ units. | cubic |

To find the _____ multiply the area of the base (B) by the height (h). | volume of a prism |

The product of a fraction and its reciprocal is _____ . | one |

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suev503