Classification of Triangle

You can classify triangles by their ___________ and by their ____________. (Select the two that apply)

• sides

• shape

• color

• angles

A triangle with all angles less than 90 degrees is called as

• Obtuse angled triangle

• Acute angled triangle

How many acute angles must an acute triangle have?

• 1

• 2

• 3

• 4

A triangle that has no equal sides is called as __________

• Equilateral triangle

• Isosceles triangle

• Scalene triangle

• None of the above

At least how many equal sides does an isosceles triangle have?

• 0

• 1

• 2

• 3

An isosceles triangle is a triangle in which exactly two sides are the same length.

• True

• False

A triangle in which all the three sides are unequal in length is called a __________.

• Scalene

• Isosceles

• equilateral

• acute

A triangle in which have all its three sides equal in length is called an _______________

• scalene

• isosceles

• equilateral

• acute

a triangle in which any one of the three angles is exactly 90°, is known as a right-angled triangle.

• True

• False

classify the triangle whose sides are:

4 cm, 4 cm and 7 cm.

• Scalene

• Isosceles

• Equilateral

• right