Geometry Chapter 8

Area Formulas

100

A=bh

What is the formula for area of a rectangle

200

A=s²

What is the formula for the area of a square?

300

A=(1/2)bh

What is the formula for area of a triangle?

400

A=pi*r²

What is the formula for area of a circle?

500

A=(1/2)*h(b₁+b₂)

What is the formula for the area of a trapezoid?

Pythagorean

100

a²+b²=c²

What is the Pythagorean Theorem?

200

An example of this would be a 3, 4, 5 triangle

What is a Pythagorean triple?

300

a²+5²=13²

What is 12?

400

3²+10²=c²

What is the square root of 109?

500

a²+32²=40²

What is 24?

Circle Review

100

A line segment connecting one side of the circle to the other

What is a chord? 

200

A line segment connecting one side of the circle to the other passing through the center of the circle.

What is a diameter?

300

A line segment that is half the length of a diameter

What is a radius?

400

C=pi*d

What is the formula for circumference?

500

A line outside the circle that touches the circle at a single point

What is a tangent line?

Circle Area

100

A=pi*9²

What is 81pi?

200

A=pi*7²

What is 49pi?

300

A=pi*22²

What is 484pi?

400

A=pi*15²

What is 225pi?

500

The radius when A=25pi

What is 5?