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Triangles

100

The SUM of the interior angles of a triangle

180^o

200

A triangle with two equal sides and 3 acute angles

Acute Isosceles 

300

A triangle with no equal sides, and one obtuse angle

scalene - obtuse triangle

400

The SUM of the interior angles of a triangle

180^o

500

The SUM of any two angles of a triangle is equal to 

the exterior angle adjiacent to the third angle

or the exterior opposite angle

Plane Figures

100

Name the distance around the Circle and give its formula

Circumference = 2πr 

Circumference = dr

200

A line drawn from the center of a circle to a point on the circle

Radius = d/2

300

Area of a triangle

(1/2)bh 

400

Area of a circle

πr²

500

Area of a square

s²

Plane figures

100

Area of a rectangle

lw

200

Area of a Trapezoid

(1/2)h(b₁+b₂)

300

A figure drawn using only a compass and straight edge

Construction

400

1. A line segment whose endpoints lie on a circle. 

2. What if it also passes through the center?

1. chord 

2. diameter

500

The region formed by the central angle and its corresponding arc

sector

Three-dimensional figures

100

a pyramid having triangles for all its faces, including the base

Tetrahedron

200

The number of sq. units within a plane figure

Area

300

The number of cubic units within a solid figure

Volume

400

Surface Area of a Sphere

4πr²

500

Volume of a Square pyramid

(1/3)b²h

Three-dimensional figures

100

A 3D firgure made of flat surfaces

Polyhedron

200

The number of sq. units contained by all the surfaces of a solid figure

Surface Area

300

Surface Area of a rectangular prism

2lw+2lh+2wh

400

Surface Area of a Cylinder

2πrh+2πr²

500

Volume of a cylinder

V=πr²h