Triangles Lesson

Multiple Choice

QUICK CHECK:

These angles are...

• Complementary

• Supplementary

Multiple Choice

QUICK CHECK:

These angles are...

• Complementary

• Supplementary

Labeling

QUICK CHECK:

Find the missing angle.

Drag labels to their correct position on the image

140

70

50

60

Multiple Choice

QUICK CHECK:

∠1 and ∠3 can best be described as - (opposite angles formed by intersecting lines.)

• complementary angles

• supplementary angles

• vertical angles

Multiple Choice

QUICK CHECK:

What is the measure of the missing angle?

• 76

• 66

• 156

• 154

Multiple Choice

A triangle that has all acute angles is:

• acute triangle

• right triangle

• obtuse triangle

• scalene triangle

Multiple Choice

A triangle that has a 90° angle is:

• acute triangle

• right triangle

• obtuse triangle

• scalene triangle

Multiple Choice

A triangle that has an obtuse angle is:

• acute triangle

• right triangle

• obtuse triangle

• scalene triangle

Multiple Choice

What does congruent mean?

• Identical (equal)

• Not Identical (Not equal)

Multiple Choice

A triangle that has at least 2 congruent sides is...

• scalene triangle

• isosceles triangle

• equilateral triangle

Multiple Choice

A triangle that has 3 congruent sides is...

• scalene triangle

• isosceles triangle

• equilateral triangle

Multiple Choice

Find the measure of the missing angle.

• 20 degrees

• 45 degrees

• 85 degrees

• 50 degrees

Multiple Choice

Find the measure of the missing angle.

• 20 degrees

• 130 degrees

• 50 degrees

• 30 degrees

Multiple Choice

What is the value of the missing angle?

• 61
• 50
• 60
• 69

Multiple Choice

Find the measure of the missing angle.

• 90^o

• 10⁰

• 130^o

• 50^o

Multiple Choice

Find the measure of each angle indicated. 

• 139°

• 66°

• 138°

• 116°

Multiple Choice

Find the measure of the missing angle.

• 20 degrees

• 130 degrees

• 50 degrees

• 80 degrees