Angles and triangles

Which equation could be used to find the value of x in the triangle shown?

• 12x + 20 = 180

• 12x = 180

• 12x - 20 =180

• 8x - 10 = 4x +10

Tags

CCSS.8.G.A.5

The value of x is _____.

Tags

CCSS.8.G.A.5

Find the missing angle TSR.

• A

• B

• C

• D

Tags

CCSS.8.G.A.5

The measure of angle ABC is _____.

Tags

CCSS.8.G.A.5

If angle 1 = 27^o, then the measure of angle 4 is _____.

Tags

CCSS.8.G.A.5

The measure of ∠C is _____.

Tags

CCSS.8.G.A.5

• x=-6

• x=6

• x=130

• x=180

Tags

CCSS.8.G.A.5

Solve for x

**consider the following equations

For complementary angles: angle 1 + angle 2 = 90

For supplementary angles: angle 1 + angle 2 = 180

• Complementary

  x = 15

• Supplementary

  x = 30

• Complementary

  x = 90

• Supplementary

  x = 180

Answer explanation

The following angles make a straight line, that means they equal 180 degrees.

For supplementary angles: angle 1 + angle 2 = 180

x + 5x = 180

6x = 180

x=30

Tags

CCSS.7.G.B.5

Classify the angles and solve for x: _____

*consider the following equations

For Complementary angles: Angle 1 + Angle 2 = 90

For Supplementary angles: Angle 1 + Angle 2 = 180

Answer explanation

The angles form a right angle, that means they are complementary angles

For Complementary angles: Angle 1 + Angle 2 = 90

x + 10 + 43 = 90

x + 53 = 90

x = 37

Tags

CCSS.7.G.B.5

The value of x is _____

Answer explanation

x and 35 are vertical angles, that means they are also congruent or EQUAL to each other. So x = 35 degrees.

Tags

CCSS.7.G.B.5