## Engage NY Eureka Math 4th Grade Module 4 Lesson 14 Answer Key

### Eureka Math Grade 4 Module 4 Lesson 14 Problem Set Answer Key

1. Draw triangles that fit the following classifications. Use a ruler and protractor. Label the side lengths and angles.
Question a.
Right and isosceles

Question b.
Obtuse and scalene

Question c.
Acute and scalene

Question d.
Acute and isosceles

Question 2.
Draw all possible lines of symmetry in the triangles above. Explain why some of the triangles do not have lines of symmetry.

Are the following statements true or false? Explain using pictures or words.

Question 3.
If ABC is an equilateral triangle, $$\overline{B C}$$ must be 2 cm. True or False?

Question 4.
A triangle cannot have one obtuse angle and one right angle. True or False?

Question 5.
∆ EFG can be described as a right triangle and an isosceles triangle. True or False?

Question 6.
An equilateral triangle is isosceles. True or False?

Extension:
In ∆ HIJ, a = b. True or False?

### Eureka Math Grade 4 Module 4 Lesson 14 Exit Ticket Answer Key

Question 1.
Draw an obtuse isosceles triangle, and then draw any lines of symmetry if they exist.

Question 2.
Draw a right scalene triangle, and then draw any lines of symmetry if they exist.

Question 3.
Every triangle has at least ____ acute angles.

### Eureka Math Grade 4 Module 4 Lesson 14 Homework Answer Key

Question 1.
Draw triangles that fit the following classifications. Use a ruler and protractor. Label the side lengths and angles.

a. Right and isosceles

b. Right and scalene

c. Obtuse and isosceles

d. Acute and scalene

Question 2.
Draw all possible lines of symmetry in the triangles above. Explain why some of the triangles do not have lines of symmetry.

Are the following statements true or false? Explain.

Question 3.
∆ ABC is an isosceles triangle. $$\overline{A B}$$ must be 2 cm. True or False?

Question 4.
A triangle cannot have both an acute angle and a right angle. True or False?

Question 5.
∆ XYZ can be described as both equilateral and acute. True or False?