PI day Geometry

Triginometry

100

Sin = (formula)

Opposite/ Hypotenuse

200

9 letter word to remember trig functions

SOH CAH TOA

300

Solve for X:          Sin30 = 20/X

40

400

solve for angle X: Cos (X) = 7/15

62.18 degrees

500

If Sin(A)= Cos(B), then <A+<B =?

90 Degrees

3D shapes

100

2D cross section of a sphere is a...

Circle

200

B for a cylinder is (formula)

Pi x Radius²

300

Cross section of a Cylinder perpendicular to the base is...

Rectangle 

400

B for triangular prism is 

1/2 x base x height 

500

Slant height of a pyramid is 13, one base edge length is 10, the REAL height is...

12

Coordinate Geometry

100

The slope formula is 

RISE over Run

200

The length formula is 

Leg² + Leg² = Hyp²

300

What makes a rectangle special is that it has 4...

Right Angles

400

What makes a Rhombus special is that it has 

4 equal sides

500

In a rectangle, the diagonals are 

Congruent.

Similarity

100

The longest side of a right triangle is called the...

Hypotenuse

200

corresponding sides of similar triangles are:

 5 and 20

7 and X

Solve for X

x = 28

300

Corresponding angles in similar triangles are...

Congruent 

400

3 Similarity theorems are...

SSS, SAS, AA

500

Corresponding sides in similar triangles are 

In Proportion

Dilations

100

A scale factor is...

The multiplier 

200

If you dilate a line, the two lines must be 

Parallel

300

Original Line: Y = -7x +9808

Slope of new dilated line is...

-7

400

If the center of dilation is ON the line, this will create...

The same line

500

Original line is 3y -2x = 9.

What is the slope of a line dilated with a scale factor of 2?

+2/3