Triangles

The measures of two angles of a triangle are 52° and 78°. Find the measure of the third angle.

The angles of a triangle are in the ratio 2 : 4 : 6. Find the measure of each of the angles.

How many parts does a triangle have?

• 3

• 6

• 9

• 12

If one angle of a triangle is equal to the sum of other two, then the triangle is a right triangle.

• False

• True

Two angles of a triangle measure 30° and 25° respectively. The measure of the third angle is

• 35°

• 45°

• 65°

• 125°

Each angle of an equilateral triangle measures 50 degree.

• True

• False

In an isosceles triangle, equal side subtend equal _____ .

• line

• side

• measure

• angle

Can a triangle have : two right angles?

• Yes

• No

Can a triangle have , each angle less than 60°?

• Yes

• No

A triangle may have four vertices.

• True

• False