Classifying and Solving for Sides/Angles in Triangles

If W(-10, 4), X(-3, -1), and Y(-5, 11) classify AWXY by its sides. Show all work to justify your answer.

Look at the sides of this triangle. What type of triangle is this?

• Equilateral
• Isosceles
• Scalene
• Obtuse

Look at the sides of this triangle. What type of triangle is this?

• scalene
• acute
• equilateral
• isosceles

Look at the sides and angles of this triangle. Which type of triangle is pictured?

• Equilateral Triangle
• Right Isosceles Triangle
• Obtuse Scalene Triangle
• Obtuse Equilateral Triangle

What type of triangle is this? 

• equilateral
• obtuse
• scalene
• isosceles

Find the measure of each angle indicated. 

• 139°
• 66°
• 138°
• 116°

Which of the following angles can you add together to equal angle d? 

• Angle a and Angle b
• Angle b and Angle c
• Angle a and Angle c
• Angle a and Angle b and Angle c

Find the value of x by using the exterior angle theorem.

• A
• B
• C
• D

Find x.

• x = 118
• x = 31
• x = 23
• x = 62

In triangle ABC, the m∠A = (21x - 1)°, the m∠B = (26x + 6)°, and m∠C = (11x + 1)°. What is the m∠B?

• 84°

• 34°

• 62°

• 90°