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