Unit 4 Vocabulary

Two angles that are next to each other and share a side.

The space inside a circle, found using the formula A = rac{1}{2} imes ext{base} imes ext{height} (where r is the radius).

The distance around a circle, like the "perimeter" of a circle. The formula is C = 2 ext{π}r or C = ext{π}d (where r is the radius and d is the diameter).

Shapes made up of two or more simple shapes, like rectangles, triangles, or circles.

Shapes or angles that are exactly the same size and shape.

A shape with straight sides where the sides or angles are not all the same.

Lines that run in the same direction and never cross.

A special number (about 3.14) used in math to calculate circles.

A shape with straight sides where all the sides and angles are the same.

A 3D box shape with 6 rectangle-shaped faces (like a shoebox).