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.