Math in Focus Grade 5 Chapter 13 Practice 1 Answer Key Classifying Triangles

This handy Math in Focus Grade 5 Workbook Answer Key Chapter 13 Practice 1 Classifying Triangles provides detailed solutions for the textbook questions.

Math in Focus Grade 5 Chapter 13 Practice 1 Answer Key Classifying Triangles

Which of these triangles are equilateral, isosceles, or scalene? Use a centimeter ruler to find out.

Question 1.

Triangle ABC is a/an triangle.
__Equilateral_ triangle.
Answer:

Triangle ABC is an equilateral triangle,

Explanation:
Given triangle ABC is an equilateral triangle because all
given 3 sides are equal.

Question 2.

Triangle DEF is a/an
_____ triangle.
Answer:

Triangle DEF is an isosceles triangle,

Explanation:
Given triangle DEF is an isosceles triangle because
only 2 sides are equal and congurent.

Question 3.

Triangle LMN is a/an
_____ triangle.
Answer:

Triangle LMN is an  scalene triangle,

Explanation:
Given triangle LMN is an scalene triangle because all
given 3 sides are not equal as LM ≠ MN ≠ LN.

Question 4.

Triangle PQR is a/an
___ triangle.
Answer:

Triangle PQR is a scalene triangle,

Explanation:
Given triangle PQR is a scalene triangle because all
given 3 sides are not equal as PQ ≠ PR ≠ RQ.

Which of these triangles are right, obtuse, or acute? Use a protractor to find out.

Question 5.

Triangle ABC is a/an
____ triangle.
Answer:

Explanation:
Given triangle ABC is acute triangle, because angle B and C is measuring less than 90⁰.

Question 6.

Triangle DEF is a/an
____ triangle.
Answer:

Explanation:
Given triangle DEF is right triangle, because angle D is measuring 90⁰.

Question 7.

Triangle LMN is a/an
____ triangle.
Answer:

Explanation:
Given triangle LMN is obtuse triangle, because angle L is measuring more than 90⁰ as 110⁰.

Question 8.

Triangle PQR is a/an
____ triangle.
Answer:

Explanation:
Given triangle PRQ is right triangle, because angle P is measuring 90⁰.