Triangles and Its types

A triangle whose all sides are equal is known as __________ triangle.

• Acute Angled

• Obtuse Angled

• Equilateral

• Isosceles

A triangle whose no two sides are equal is known as __________ triangle.

• Equilateral

• Isosceles

• scalene

• none of these

A triangle whose one angle is equal to _____ is known as right angled triangle.

• 80°

• 70°

• 90°

• 120°

The sum of the angles of a triangle is _____.

• 30°

• 90°

• 180°

• 60°

A triangle can have two right angles. Mark True / False.

• True

• False

A triangle can be classified as an isosceles triangle if there are two equal sides.

• True

• False

What are the three ways to classify triangles by their sides?

• equilateral, right, isosceles

• scalene, obtuse, right

• equilateral, isosceles, scalene

• acute, right, isosceles

What does the term scalene mean?

• all sides equal

• two sides equal

• 90 degree angle

• all sides not equal

The triangle sum theorem states that the sum of the interior angles of all triangles equals ________.

• 100*

• 180*

• 90*

• 360*

The sum of angles of a triangle is ________degrees

• 360

• 180

• 90

• 120