order the side lengths from least to greatest. order the angle measurements from least to greatest....

Bell Work

Order the side lengths from least

to greatest.

Order the angle measurements from least to

greatest.

A

B

C65°

62°

53°

A

B

C7 in.

10 in.

9 in.

Note: The figures are not drawn to scale.

<B, <A, <C

AB, AC, and BC

Finding an Angle Measure in a Triangle

Find the value of x in the triangle shown.

26

83 x

We know that:x + 83 + 26 =

180x + 109 = 180 -109 -109 x = 71

So, the value of x is 71°.

You Try

Find the value of x in the triangle shown.

26

92 x

We know that:x + 92 + 26 = 180x + 118 = 180 -118 -118 x = 62

So, the value of x is 71.

You try!

Find the value of x.

A

B

C67°

82°

x°

A

B

C27° 3x°

78°

Note: The figures are not drawn to scale.

x + 82°+ 67°= 180°x + 149 = 180 -149 -149

x = 31°

3x + 27°+ 78°= 180°

3x + 105 = 180 -105 -105

3x = 75°x = 25°

Classifying Triangles

by sides and anglesBeat the

Computer Drill

Review!

Directions:

Classify each triangle by both its SIDES and its ANGLES. You will have 10 seconds

before the computer shows you the answer.

When the slide appears, as a group choose BOTH NAMES for the type of triangle and hold up your answer.

REMEMBER: YOU HAVE TO BEAT THE CLOCK! You only have 10 seconds!

Classify by sides:

Classify by angles:

Trial Run

Classify by sides:

Classify by angles:

alsoIsosceles Triangle

alsoEquilangul

ar Triangle

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

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Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

Classify by sides:

Classify by angles:

alsoIsosceles Triangle

alsoEquilangul

ar Triangle

Are you a triangle expert?

Review• In order to form a triangle, the sum

of the angles has to equal 180°.• In order to form a triangle, the sum

of the two smallest side lengths has to be GREATER than the third side.

• In a triangle, the largest angle is opposite the longest side. The smallest angle is opposite the shortest side.

• Skills Check will be on Thursday!!!

Practice