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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

MEAP Preparation - Grade 7 Mathematics
4.17 Perimeter of a Triangle

Points to remember:

Perimeter of a triangle:
  • The sum of the measures of AB, BC and CA is called the perimeter of the triangle ABC.

  • Perimeter of triangle ABC = BC + CA + AB = a + b + c, where a, b and c are the lengths of the sides BC, CA and AB.

Example:

The length of sides of a triangle are given by a = 2 cm, b = 5 cm, and c = 4 cm. Find the perimeter of the triangle formed by the lines segments BC, CA, and AB.

Answer: Perimeter of the triangle = a + b + c = 2 + 5 + 4 = 11 cm


Directions: Read the above review points carefully and answer the following questions:
  1. Illustrate each of the above review points by drawing a triangle.
  2. Explain in your own words how to find the perimeter of triangles.

Q 1: "The perimeter of a triangle ABC = a + b + c, where 'a' is the length of the side BC, 'b' is the length of the side CA and 'c' is the length of the side AB".
True
False

Q 2: A triangle has a perimeter of 50 cm. If 2 of its sides are equal and the third side is 5 more than the equal sides, then the length of the third side is _________ cm.
Answer:

Q 3: The perimeter of a triangle whose sides are a = 3 cm, b = 7 cm and c = 8 cm is _________ cm.
Answer:

Q 4: The perimeter of a triangle ABC is given by 45 cm. If the length of the side AB is 2 more than the length of the side BC and length of the side BC is 5 more than the length of the side CA, then the length of side AB is _________.
18 cm
21 cm
20 cm

Q 5: "The perimeter of a triangle is always measured in centimeter's".
False
True

Q 6: Find the perimeter of a triangle whose sides are 33.25 cm, 52.45 cm and 49.30 cm. (Type the answer as Number space Units)
Answer:

Q 7: The perimeter of a triangle with sides a = 3 cm, b= 9 cm and c = 10 cm is 22 cm.
False
True

Q 8: The perimeter of a triangle with sides x, y and z is given by _________.
x + y + z
x+y, y+z, z+x
xyz

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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