M7L1 example

6
Triangle Ratio Example

Transcript of M7L1 example

Triangle Ratio Example

The measures of the angles in a triangle are in the extended ratio of 2:2:5. Find the measures of the

angles.

• Draw a Picture, label the angles

5x

2x 2x

Set up your equation

• The angles in a triangle always add to 180 so:

2x +2x + 5x = 180

Solve

• 2x +2x +5x =180

• 9x=180

• x=20

Substitute

• The problem wants the angles, not x. Plug in x=20 into your angles.

5x=5(20)=100

2x=2(20)=40

2x=2(20)=40

Answer

• Your angle measures are 100°, 40°, and 40°