Sum of Angles in a Triangle

Which set of angle measures could be the measures of the interior angles of a triangle?

• 60°, 45°, and 70°

• 30°, 85°, and 25°

• 55°, 90°, and 35°

• 110°, 15°, and 45°

Tags

CCSS.8.G.A.5

Which set of angle measures could be the measures of the interior angles of a triangle?

• 90°, 42°, and 58°

• 60°, 60°, and 60°

• 100°, 48°, and 42°

• 31°, 75°, and 70°

Tags

CCSS.8.G.A.5

What is the measure of angle B?

• 78

• 92

• 102

• 282

Tags

CCSS.8.G.A.5

What is the value of x?

• 56

• 66

• 124

• 236

Tags

CCSS.8.G.A.5

The measure of angle B is 83 , and the measure of angle C is 42.

What is the measure of angle D?

• 41

• 45

• 55

• 125

Tags

CCSS.8.G.A.5

The measure of one interior angle of a triangle is 45°. What can you conclude about the other two interior angles of the triangle?

• One of the other angles must be a right angle.

• The sum of the measures of the other two angles is 135°.

• The other two angles must be acute angles.

• One of the other angles must have a measure greater than 90°.

Tags

CCSS.8.G.A.5

What is the sum of the measures of the interior angles of any triangle?

• 100

• 180

• 270

• 360

Tags

CCSS.8.G.A.5

Which has a measure that is equal to the sum of the measures of the interior angles of a triangle?

• a straight line

• a circle

• a right angle

• an obtuse angle

Tags

CCSS.8.G.A.5

Aliya lined up the interior angles of the triangle along line p below.

When the measure of angle A increases in the triangle, what happens to angle A on line p?

• It also increases.

• It decreases.

• It stays the same.

• It may increase, or it may stay the same.

Tags

CCSS.7.G.B.5

Hassan lined up the interior angles of the triangle along the line below.

What is the measure of the missing angle along the line?

• 30

• 38

• 112

• 150

Tags

CCSS.8.G.A.5