**corrected by**Report an error / Note?

Exercise 1:

1. Let LNI be a triangle such that :

Calculate the measure of the angle

2. Let SAC be a triangle such that

Calculate the measure of the angle

Exercise 2:

Exercise 3:

Exercise 4:

ACD is an equilateral triangle so its three angles measure 60°.

ACE is an isosceles right triangle so

Then is a flat angle so

And ABC is isosceles at A so its base angles have the same measure.

and the last angle measures :

180-150=30°

Exercise 5:

The triangle MNQ is isosceles with main vertex M and base [NQ].

The triangle PMN is isosceles with main vertex P and base [MN].

The angle measures .

**Determine the measure of the angle . **

MQN is isosceles at M so the angles at the base are equal.

so

The trangle NPM is isosceles at P so the angles at the base have the same measure.

then

and

Exercise 6:

Consider a triangle MNO, isosceles with main vertex N and base [MO].

We know that . Deduce the measure of and .

The angles at the base have the same measure for an isosceles triangle.

Exercise 7:

Consider an equilateral triangle JKL.

Deduce the measure of its three angles.

the three angles of an equilateral triangle are 60°.

Exercise 8:

Consider a triangle GHI, right-angled at H. We know that = 34°.

Deduce the measure of .

Exercise 9:

Magalie measured the angles DEF with her protractor.

She found = 53°, = 74° and = 54°.

What do you think of his answer? Justify.

Magalie’s measurements are wrong because the sum of the three angles of a triangle is 180°.

Exercise 10:

Consider a triangle ABC. We know that = 28° and = 73°.

Deduce the measure of .

Exercise 11:

What is the measure of angle DEF?

(the opposite angles of a parallelogram have the same measure).

(two angles opposite by the vertex have the same measure).

(the sum of the angles of a triangle is )

Exercise 12:

What is the measure of the angle ADB?

In the triangle ADC :

The angle is a flat angle.

Exercise 13:

Exercise 14:

Exercise 16:

The sum of the angles is 180°.

90°+84,7°=174,7°

180°-174,7°=5,3°

So the angle of inclination to the vertical is 5.3°.

## The answers to the exercises on the triangle in 5th grade.

After consulting **the answers to these exercises on triangles in 5th** grade, you can return to the **exercises in 5th** grade.

Cette publication est également disponible en : Français (French) Español (Spanish)

Download and print this document in PDF for free

You have the possibility to download then print this document for free «**triangle : corrected 5th grade math exercises in PDF.**» in PDF format.

Other documents in the category corrected by

- Fractions: answer key to 5th grade math exercises in PDF.
- The literal caclulus : corrected 4th grade math exercises in PDF.
- Answer key for the maths brevet France 2017
- Arithmetic and prime factor decomposition: answer key to 3rd grade math exercises in PDF.
- Scratch: programming exercises in 5th grade.
- Scratch : corrected algorithms and programming exercises in 4th grade in PDF.
- Scratch : correction of the exercises in 3rd grade of programming.
- Answers to the mathematics exam 2021 in France
- Barycenter: answer key to senior math exercises in PDF.
- Integral calculus: answer key to senior math exercises in PDF.

Other forms similar to triangle : corrected 5th grade math exercises in PDF..

- 88
- 87
- 87

Les dernières fiches mises à jour.

Voici les dernières ressources similaires à **triangle : corrected 5th grade math exercises in PDF.** mis à jour sur *Mathovore* (des cours, exercices, des contrôles et autres), rédigées par notre équipe d'enseignants.

On *Mathovore*, there is **13 624 777 math lessons and exercises downloaded in PDF**.