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1. If a triangle has angles 120
0
, 20
0
, 40
0
. Is it an obtuse triangle?
yes
no
2. If a triangle has angles 100
0
, 50
0
, 30
0
. Is it an acute triangle?
yes
no
3. If a triangle has angles 30
0
, 60
0
, 90
0
. Is it a right angle triangle?
yes
no
4. A triangle has angles 60
0
, 60
0
, 60
0
. Is it an equilateral triangle?
yes
no
5. If a triangle has angles 60
0
, 60
0
, 60
0
. Is it an acute triangle?
yes
no
6. If a triangle has 2 sides with equal lengths and 72
0
angle between them. What type of triangle is it?
Equilateral triangle
Isosceles triangle
Right Angle triangle
7. If a triangle has 2 angles of 45
0
. What is the measure of third angle in degree?
85
90
75
8. If a triangle has two sides with equal lengths and 60
0
angle between them. What is the type of triangle?
Equilateral
Isosceles
Both
9. The perimeter of an equilateral triangle is 18cm. What is the length of one side?
9cm
3cm
6cm
10. If a triangle has sides of 3cm, 4cm, 5cm, what is the type of triangle?
Equilateral
Isosceles
Right Angle
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