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Common angle, polygon, circle, area, and volume facts used in introductory geometry.
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Cards
1. How many degrees are in a right angle?
90 degrees
90°
2. How many degrees are in a straight angle?
180 degrees
180°
3. What do complementary angles sum to?
90 degrees
90°
4. What do supplementary angles sum to?
180 degrees
180°
5. What is the sum of a triangle's interior angles?
180 degrees
180°
6. What is an equilateral triangle?
A triangle with three equal sides
7. What is an isosceles triangle?
A triangle with at least two equal sides
8. What is the Pythagorean theorem?
a² + b² = c² for a right triangle
a^2 + b^2 = c^2
9. What is the area of a rectangle?
length × width
lw
10. What is the area of a triangle?
one-half × base × height
1/2 bh
11. What is the circumference of a circle?
2πr
πd
12. What is the area of a circle?
πr²
pi times radius squared
13. What is the volume of a rectangular prism?
length × width × height
lwh
14. What is the volume of a cylinder?
πr²h
15. What are congruent figures?
Figures with the same size and shape