# Test: Triangles - Normal

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Question 1:   Find $\alpha$

$\alpha ={85}^{\circ }$
$\alpha ={90}^{\circ }$
$\alpha ={95}^{\circ }$
$\alpha ={80}^{\circ }$
Question 2:   Find $\alpha$

$\alpha ={33}^{\circ }$
$\alpha ={57}^{\circ }$
$\alpha ={66}^{\circ }$
$\alpha ={68}^{\circ }$
Question 3:   Find the area of a triangle:

$96c{m}^{2}$
$48c{m}^{2}$
$72c{m}^{2}$
$24cm$
Question 4:   Which sets of numbers are side lengths of a triangle?
$5,6,7$
$4,7,12$
$2,2,4$
$5,8,15$
Question 5:   Find the area of the triangle:

$120c{m}^{2}$
$135c{m}^{2}$
$90c{m}^{2}$
$67.5c{m}^{2}$
Question 6:   Find the length of the side $a$

$a=4cm$
$a=5cm$
$a=3cm$
$a=4.5cm$
Question 7:   Find $\alpha$

$\alpha ={75}^{\circ }$
$\alpha ={30}^{\circ }$
$\alpha ={45}^{\circ }$
$\alpha ={60}^{\circ }$
Question 8:   Find the length of the diagonal $d$

$d=8cm$
$d=10cm$
$d=12cm$
$d=14cm$
Question 9:   Which of the below triangles is acute?
Question 10:   Which of the below triangles is equilateral?