Grade 9 Mathematics (UT)

Find the area of a triangle whose sides are 9m, 12m and 15m

• 64 m²

• 48 m²

• 84 m²

• 54 m²

An isosceles right triangle has an area 8 cm ² . The length of its hypotenuse is

• √32cm

• √16 cm

• √48 cm

• 
  

  √24 cm

• 36 cm

• 24 cm

• 30 cm

If the angles forming linear pair are in the ratio 4:6 then measure of obtuse angle

• 36 degree

• 72 degree

• 108 degree

• None

• 2x-6=7x+4
• 2x-6+7x+4=90
• 2x-6+7x+4=180
• 2x-6+7x+4=360

If an angle is half of its complementary , find the angle

• 60 degree

• 30 degree

• 40 degree

• None

In a triangle if 4∠A = 3∠B = 12L∠C, find all the angles.

• A=60, B=80, C=40
• A=80, B=60, C=40
• ∠A= 67.5°,∠B= 90°,∠C=22.5°

• A=60, B=45, C=75

Which postulate is this ?

• 4

• 2

• 1

• 5

If x = y then 2x = 2y. Which is the axiom supporting the given statement

• Things which are equal to the same thing are equal to one another.

• Things which are double of the same things are equal to one another.

• Things which coincide with one another are equal to one another.

• If equals are added to equals, the wholes are equal.

Euclid divided his famous treatise 'The Elements' into___

• 13 chapters
• 12 chapters
• 11 chapters 
• 9 chapters