Angles in Triangles and Parallel Lines

The video tutorial covers solving problems involving triangles and angles. It begins with a problem where the largest angle is four times the second largest, and the smallest angle is 10 degrees. The solution involves setting up equations and solving for the unknown angles. The tutorial then explores a scenario with parallel lines and transversals, demonstrating how to identify corresponding angles and solve for unknowns using supplementary angles.

What is the measure of the smallest angle in the triangle described in the problem?

• 180 degrees

• 136 degrees

• 34 degrees

• 10 degrees

Tags

CCSS.7.G.B.5

If the largest angle is four times the second largest angle, and the smallest angle is 10 degrees, what is the equation to find the second largest angle?

• 4x + x + 10 = 180

• x + 10 = 180

• 4x = 180

• x + 4x = 10

Tags

CCSS.8.G.A.5

After solving the equation, what is the measure of the second largest angle?

• 10 degrees

• 180 degrees

• 34 degrees

• 136 degrees

Tags

CCSS.8.G.A.5

What is the measure of the largest angle in the triangle?

• 180 degrees

• 34 degrees

• 136 degrees

• 10 degrees

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

In the new problem, what is the relationship between the two lines mentioned?

• They are perpendicular

• They are parallel

• They are intersecting

• They are skew

Tags

CCSS.7.G.B.5

What is the measure of the angle labeled as 2x in the parallel lines problem?

• 120 degrees

• 90 degrees

• 60 degrees

• 30 degrees

Tags

CCSS.7.G.B.5

What is the measure of the angle labeled as 4x in the parallel lines problem?

• 60 degrees

• 30 degrees

• 120 degrees

• 90 degrees

Tags

CCSS.7.G.B.5

What property of angles is used to determine that 4x and 2x are supplementary?

• Adjacent angles forming a straight line

• Alternate interior angles

• Corresponding angles

• Vertical angles

What is the value of x in the parallel lines problem?

• 30

• 15

• 45

• 60

Tags

CCSS.8.G.A.5

Which of the following is true about the angles in the parallel lines problem?

• They are all equal

• They are complementary

• They are supplementary

• They are congruent

Tags

CCSS.8.G.A.5