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# Geometry

### Vocabulary on the subject of shapes, perimeter, and lines.

How do you find the area of a rhombus? A= 1/2 (D1 + D2)
How do you find the area of a trapezoid? A= B1 +B2/ 2 divided by h
How do you find the area of a circle? A= πr²
How do you find area of a parallelogram? A= bh
How do you find the area of a triangle? A=(bh) divided by 2
What is an acute angle? An angle less than 90°
What is a right angle? An angle that is exactly 90°
What is an obtuse angle? An angle that is larger than 90°
What is square? A number multiplied by itself. (Ex: 6² = 36)
What is square root? A number that produces a specified quantity when multiplied by itself. (Ex: Square root of 144 = 12 because 12 x 12 = 144)
What is pi? A name given to the ratio of the circumference of a circle to the diameter.
What is an isosceles triangle? A triangle with two equal sides and angles.
What is a right triangle? A triangle with one right angle.
What is an equilateral triangle? A triangle with all sides and angles equal.
What is a scalene triangle? A triangle with all sides and angles different.
What is the sum of all angles? 180°
The largest angle is opposite the _____ side. Longest.
Created by: 100031193