Class 9 | Math Linear Equation, Midpoint Theorem, Pythagoras Theorem and Physics Sound Written Test FM 40

 

ANSWER  MATHS

1. 
The perimeter of a triangle ABC is 37cm and the ratio between the lengths of its altitudes be 6:5:4. Find the lengths of its sides.

3. 
A man starts his job with a certain monthly salary and earns a fixed increment every year. If his salary was Rs. 1500 after 4 year of service and Rs. 1800 after 10 years of his service, what was his starting salary and what is the annual increment?

4. 
ABCD is a rhombus with P,Q,R as mid-points of AB, BC and CD. Prove that PQ⊥QR.

6.
Triangle ABC is right angled at B. Given that AB=9 cm, AC= 15 cm and D,E are the mid point of the Sides AB and AC respectively, Calculate (i) Th length of BC, (ii) The are of triangle ADE

7.
In triangle ABC, AD perpendicular to BC and AD2 =BD x CD.prove that triangle ABC is a right triangle

8.
If ABC is a right angled triangle in which angle A=90°, AD is perpendicular to BC and AB:AC=3:4 and AD=8, then BD=?