Exploring the Triangle Angle Sum Theorem

What does the Triangle Angle Sum Theorem state?

• The sum of the angles in a triangle is 270 degrees.

• The sum of the angles in a triangle is 360 degrees.

• The sum of the angles in a triangle is 180 degrees.

• The sum of the angles in a triangle is 90 degrees.

Tags

CCSS.8.G.A.5

In the given example, what are the known angles of the triangle?

• 30 degrees and 80 degrees

• 40 degrees and 80 degrees

• 50 degrees and 100 degrees

• 30 degrees and 50 degrees

Tags

CCSS.8.G.A.5

What equation is set up to find the unknown angle X?

• 30 + 80 + X = 360

• 30 + 80 + X = 270

• 30 + 80 + X = 180

• 30 + 80 + X = 90

Tags

CCSS.4.MD.C.7

What is the sum of the known angles in the example problem?

• 110 degrees

• 120 degrees

• 90 degrees

• 100 degrees

What is the value of the unknown angle X after solving the equation?

• 80 degrees

• 70 degrees

• 60 degrees

• 90 degrees

Tags

CCSS.7.G.B.5

What operation is performed to isolate X in the equation 110 + X = 180?

• Add 110 to both sides

• Subtract 110 from both sides

• Multiply both sides by 110

• Divide both sides by 110

Tags

CCSS.4.MD.C.7