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Triangles

Instructions: Answer the following questions about triangles.

  1. This triangle has no congruent sides, what kind of a triangle is this?
    Acute Triangle v3
    1. isosceles
    2. equilateral
    3. scalene
    4. right triangle
  2. In triangle ABC below, side AB = 41 cm, side AC = 40 cm and side BC = 9 cm.                      is the largest angle in the triangle and                      is the smallest angle in the triangle.
    Obtuse Triangle ABC v3
  3. In triangle ABC below. The ratio of angle A:B:C is 2:3:4. What is the measure of angle B? Show your work.
    Obtuse Triangle ABC v3



  4. Side AB = 30 cm, Side BC = 30 cm, Side AC = 20 cm. What kind of a triangle is this?
    Isosceles Triangle ABC v1
    1. isosceles
    2. right triangle
    3. scalene
    4. equilateral
  5. Angle B is a right angle. Label the point where the altitude intersects the hypotenuse D. Given that segment AD = 6 and segment DC = 18. Find the length of the altitude. Show your work and round to the nearest tenth.
    Acute Triangle Height v2



  6. All of the sides of this triangle are equal. What kind of a triangle is this?
    Equilateral Triangle v2
    1. scalene
    2. isosceles
    3. equilateral
    4. right triangle
  7. If the height of this triangle is 4 cm, side AB = 5 cm and side BC = 12 cm, what is the area of this triangle?
    Acute Triangle Height v2
    1. 52 cm^2
    2. 26 cm^2
    3. 13 cm^2
    4. 62 cm^2