1. Rectangle

2. Right Angle

3. Isosceles Triangle
2 equal sides

4. Two lines that never touch
Parallel
Two lines that never touch

5. Pyramid

6. Circumference

7. Parallelogram

8. Acute Angle

9. Scalene Triangle
No equal sides

10. Two lines that form a 90° angle
Perpendicular
Two lines that form a 90° angle

11. Diameter

12. Trapezoid

13. Obtuse Angle

14. Equilateral Triangle
3 equal sides

15. Add all of the Sides
Perimeter

16. Area
Length x Width

17. 8 cm
8 cm
Isosceles triangle

18. Radius

19. Perpendicular Lines

20. Perimeter
Add all sides

21. How many edges? 9

22. Right Angle
Exactly 90°

23. 135°
Obtuse triangle

24. Length x Width
Area

25. Parallel Lines

26. Obtuse Angle
More than 90°

27. Same size and shape
Congruent

28. How many faces? 6

29. Acute Angle
Less than 90°

30. Prism