Intro to Triangles

What type of triangle is shown?

• Isosceles

• Right-angled

• Equilateral

• Scalene

Classify the following triangle based on the angles.

• Equilateral

• Right

• Obtuse

• Acute

Find the value of x.

• 135

• 45

• 90

• 67.5

Find the value of y.

• 135

• 45

• 90

• 67.5

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

The term “kitchen triangle” refers to the imaginary triangle formed by the refrigerator, the sink, and the stove. What is wrong with the labels on the triangle shown?

• There is nothing wrong with the triangle shown.

• The shortest side is not across from the smallest angle.

• The longest side is not across from the largest angle.

• The triangle cannot exist because the angles do not add up to 180 degrees.

Find the longest side of triangle ABC if the measure of angle A is 70, the measure of angle B is 2x – 10, and the measure of angle C is 3x + 20.

• AB

• BC

• AC

∠2 & ∠6 are...

• Supplementary angles
• Vertical angles
• Corresponding angles