Les triangles quelconques

Les triangles quelconques

4th Grade

15 Qs

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Les triangles quelconques

Les triangles quelconques

Assessment

Quiz

Mathematics

4th Grade

Practice Problem

Hard

Created by

Cathy Plennevaux

Used 72+ times

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15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Trouvez l'intrus pour le triangle donné

α+β+θ=180°\alpha+\beta+\theta=180°

La somme des angles d'un triangle vaut 180°

α+β+π=180°\alpha+\beta+\pi=180\degree

α+β=180°θ\alpha+\beta=180\degree-\theta

2.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Media Image

Quelle(s) est(sont) les bonnes formules?

S=12.a.b.sin(θ)S=\frac{1}{2}.a.b.\sin\left(\theta\right)

S=12.a.c.sin(β)S=\frac{1}{2}.a.c.\sin\left(\beta\right)

S=12.b.c.sin(α)S=\frac{1}{2}.b.c.\sin\left(\alpha\right)

S=12.a.c.sin(θ)S=\frac{1}{2}.a.c.\sin\left(\theta\right)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Quelle est la formule fausse?

a2=b2+c22.b.c.cos(α)a^2=b^2+c^2-2.b.c.\cos\left(\alpha\right)

b2=c2+a22.a.c.cos(β)b^2=c^2+a^2-2.a.c.\cos\left(\beta\right)

c2=a2+b22.a.b.cos(π)c^2=a^2+b^2-2.a.b.\cos\left(\pi\right)

c2=a2+b22.a.b.cos(θ)c^2=a^2+b^2-2.a.b.\cos\left(\theta\right)

4.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Media Image

Quelle(s) est(sont) les formule(s) correcte(s)?

asin(α)=bsin(β)=csin(θ)\frac{a}{\sin\left(\alpha\right)}=\frac{b}{\sin\left(\beta\right)}=\frac{c}{\sin\left(\theta\right)}

asin(α)=sin(β)b=csin(θ)\frac{a}{\sin\left(\alpha\right)}=\frac{\sin\left(\beta\right)}{b}=\frac{c}{\sin\left(\theta\right)}

sin(α)a=sin(β)b=sin(θ)c\frac{\sin\left(\alpha\right)}{a}=\frac{\sin\left(\beta\right)}{b}=\frac{\sin\left(\theta\right)}{c}

asin(α)+bsin(β)=csin(θ)\frac{a}{\sin\left(\alpha\right)}+\frac{b}{\sin\left(\beta\right)}=\frac{c}{\sin\left(\theta\right)}

5.

MULTIPLE SELECT QUESTION

1 min • 1 pt

 Si a=2; b = 3 et β=67°, alorsSi\ a=2;\ b\ =\ 3\ et\ \beta=67°,\ alors  

je commence mes calculs par la formule des cosinus

je commence mes calculs par la somme des angles d'un triangle

je commence mes calculs par la formule des sinus

 α=37,85°\alpha=37,85°  

6.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

 Si a = 2; b = 4 et c = 5, alorsSi\ a\ =\ 2;\ b\ =\ 4\ et\ c\ =\ 5,\ alors  

je commence mes calculs par la formule des cosinus

je commence mes calculs par la formule des sinus

 α=22,33°\alpha=22,33°  

 β=49,46°\beta=49,46°  

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A partir de trois données, on peut construire

0 triangle quelconque

1 seul triangle quelconque

0, 1 ou 2 triangles quelconques

une infinité de triangles quelconques

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