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# HCPSS Gr5Q3 Geometry

### Geometry Vocabulary for 5th Graders

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

What is a two-dimensional object that can be folded to make a three-dimensional object? | net |

Figures with the same size and shape or line segments that are the same length are _________. | congruent |

When you turn a figure around a point, you are doing a _______ . | rotation roTation (T for turn) |

Two lines that intersect at right angles are called _______. | perpendicular |

A three-dimensional figure is called a _____. | solid figure |

When you slide a figure from one place to another, you are doing a ______. | translation tranSLation (SL for slide) |

The face of a solid figure by which the figure is measured or named is called the _______. | base |

Figures that have the same shape but different sizes are called _______. | similar |

When two or more lines cross or meet at exactly one point they are called ______. | intersecting lines |

Lines that are always the same distance apart and will never cross or touch are called _________. | parallel (The double letters in the middle remind us of the meaning of the word!) |

A figure that can be measured in only two directions (length and width) is called a _______. | two-dimensional figure |

A figure that can be measured in three directions (length, width, and height) is called a _____. | three-dimensional figure |

When you make a mirror image of a figure by flipping it over, you are making a _________. | reflection reFLection (FL for flip) |

A tool used for drawing and measuring angles is called a ________. | protractor |

Angles that measure less than 90 degrees are called _____. | acute angles |

Angles that measure greater than 90 degrees are called ______. | obtuse angles |

Angles that measure exactly 90 degrees are called _____. | right angles |

In geometry, what is the name of a location on a line, line segment, ray or plane (usually drawn as a dot)? | point |

A _____ extends out in two directions and can go on forever. We always name two points somewhere on a ______. | line |

A ___________ is a piece a line that has two endpoints. We name a _______ by its endpoints. | line segment |

A _______ has one endpoint and extends in one direction forever. We always name the endpoint first and then one more point on a _____. | ray |

A three-sided figure whose sides and angles are all equal is called a ______. | equilateral triangle |

A three-sided figure that has two sides that are equal to each other and one side that is a different length is called a ______. | isosceles triangle |

A three-sided figure with no equal sides (all three sides are different lengths) is called a ______. | scalene triangle |

a three-sided figure in which one of its angles is a right angle (90 degrees)is called a _________. | right triangle |

Where two sides of a solid figure meet is called the ______. | edge |

Where three sides of a solid figure meet is called a _______. | vertex (plural is vertices) |

The flat sides of a geometric solid are called ______. | faces |

A two-dimensional (flat) figure that goes on in two directions forever is called a ________. | plane |

A plane (flat) figure with three or more straight sides is called a _____. | polygon |

A plane figure that has four sides and four angles is called a _____. | quadrilateral |

A plane figure with four congruent (equal) sides and four right angles is a _____. | square |

A four-sided figure with right angles and with opposite sides that are parallel is a _____. | rectangle |

A plane figure with four sides whose opposite sides are parallel and equal to each other is a _____. | parallelogram |

A parallelogram whose sides are all equal is a _____. | rhombus |

A figure with four sides but with only two sides that are parallel is a _____. | trapezoid |

the sum of all the sides (s + s + s) | perimeter |

length times width (l x w) | area |

length times width times height (l x w x h) | volume |

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