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Triangles
Test Description: Properties of triangles
Instructions: Answer all questions to get your test result.
1) A triangle with two equal sides.
A
right-angled triangle
B
obtuse-angled triangle
C
isosceles triangle
D
equilateral triangle
2) A triangle with three equal angles.
A
obtuse-angled triangle
B
right-angled triangle
C
equilateral triangle
D
scalene triangle
3) A triangle with three different sides and one of its angles is 120°.
A
acute-angled triangle
B
obtuse-angled triangle
C
scalene triangle
D
scalene obtuse-angled triangle
4) The angle facing the shortest length in a triangle is
A
a right angle
B
an acute angle
C
an opposite angle
D
the smallest angle
5) One of the base angles in an isosceles triangle is 75°, then its exterior angle is
A
75°
B
30°
C
285°
D
105°
6) A triangle with 3 equal sides.
A
isosceles triangle
B
equilateral triangle
C
obtuse-angled triangle
D
scalene triangle
7) A right-angled triangle has 2 equal sides. Both its base angles will be
A
5°
B
45°
C
90°
D
135°
8) The vertical angle of an isosceles triangle is 80°. Both its base angles will be
A
20°
B
100°
C
10°
D
50°
9) The sum of angles in a triangle is
A
360°
B
90°
C
180°
D
100°
10) A triangle with 3 different angles. All the angles are less than 90°.
A
an equilateral triangle
B
an acute-angled triangle
C
a right-angled triangle
D
an obtuse-angled triangle
11) Can an isosceles triangle be an equilateral triangle?
A
No
B
Sometimes
C
None of the above
D
Yes
12) Can an equilateral triangle have angles that are less than 60°.
A
Maybe
B
No
C
None of the above
D
Yes
*select an answer for all questions
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