All the solutions provided in **McGraw Hill Math Grade 5 Answer Key PDF Chapter 10 Lesson 3 Classifying Triangles **are as per the latest syllabus guidelines.

## McGraw-Hill Math Grade 5 Answer Key Chapter 10 Lesson 3 Classifying Triangles

**Classify**

**Classify each triangle as equilateral, scalene, or isosceles. Then classify each triangle as acute, obtuse, or right?**

Question 1.

Answer:

An equilateral triangle has three sides of equal length. In the above image we can observe the triangle having three sides with a same length as 3.4 m. So, the above triangle is **equilateral triangle**.

In the above triangle we can observe all the angles are 60 degrees. The angle which measures less than 90 degrees is called as acute angle. So, the above triangle is **acute angle triangle**.

Question 2.

Answer:

A scalene triangle has no sides of equal length. In the above image we can observe the triangle having three sides with a different lengths. So, the above triangle is **scalene triangle**.

In the above triangle we can observe the angle is 90 degrees. The angle which measures exactly 90 degrees is called as right angle. So, the above triangle is** right angle triangle**.

Question 3.

Answer:

A scalene triangle has no sides of equal length. In the above image we can observe the triangle having three sides with a different lengths. So, the above triangle is **scalene triangle**.

In the above triangle we can observe the angle is 125 degrees. The angle which measures greater than 90 degrees and less than 180 degrees is called as obtuse angle. So, the above triangle is **obtuse angle triangle**.

Question 4.

Answer:

A scalene triangle has no sides of equal length. In the above image we can observe the triangle having three sides with a different lengths. So, the above triangle is **scalene triangle**.

In the above triangle we can observe the angle is 120 degrees. The angle which measures greater than 90 degrees and less than 180 degrees is called as obtuse angle. So, the above triangle is **obtuse angle triangle**.

Question 5.

Answer:

An isosceles triangle has two sides of equal length. In the above image we can observe the triangle having two sides of length 5 mi and one side with a length 2.6 mi. So, the above triangle is **isosceles triangle**.

In the above triangle we can observe all the angles are less than 90 degrees. The angle which measures less than 90 degrees is called as acute angle. So, the above triangle is **acute angle triangle**.

Question 6.

Answer:

An equilateral triangle has three sides of equal length. In the above image we can observe the triangle having three sides with a same length as 8 cm. So, the above triangle is **equilateral triangle**.

In the above triangle we can observe all the angles are 60 degrees. The angle which measures less than 90 degrees is called as acute angle. So, the above triangle is **acute angle triangle**.