Triangles

A ——— connects a vertex of a triangle to the mid-point of the opposite side.

• Altitude

• Median

• Opposite side

The total measure of the three angles of a triangle is ————

• 90

• 360

• 180

• 0

An ———- angle of a triangle is equal to the sum of its interior opposite angles.

• Exterior angle

• Interior angle

• Adjacent angle

• NONE

A triangle in which two sides are of equal lengths is called an —————

• Scalene triangle

• Equilateral triangle

• Isosceles triangle

In a right angled triangle, the side opposite to the right angle is called the ————-

• leg

• hypotenuse

• altitude

If the two angles of a triangle are 50 degree and 70 degree, then the measure of third angle is ——————

• 50

• 60

• 70

• 90

If all the angles of a triangle are acute, the triangle is called

• obtuse-angled

• acute-angled

• right-angled

• none of these

Which of the following statements is true?

• A triangle can have two right angles

• A triangle can have two obtuse angles

• A triangle can have two acute angles

• A triangle can have all the three angles less than 60°

In the following figure, the side BC of ∆ ABC is extended up to the point D. If ∠ A = 55° and ∠ B = 60°, then the measure of ∠ACD is

• 120°

• 110°

• 115°

• 125°

In the following figure, find x if y is 40 degree

• 60°

• 75°

• 80°

• 70°