Home
Class 9
MATHS
In triangleABC, BC=10 cm and the length ...

In `triangleABC`, BC=10 cm and the length of altitude AD is 5 cm. Then , ar(ABC)=….. `cm^2`.

A

50

B

100

C

25

D

15

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • AREAS OF PARALLELOGRAMS AND TRIANGLES

    KUMAR PRAKASHAN|Exercise Skill Testing Exercise|12 Videos

  • BOARD'S SAMPLE QUESTION PAPERS (QUESTION PAPER 1 : FOR THE FIRST TEST)

    KUMAR PRAKASHAN|Exercise Section D (Solve the following) |4 Videos

Similar Questions

Explore conceptually related problems

The area of a triangle is increasing at the rate of 4 cm^(2)//s . Its altitude is increasing at the rate of 2 cm/s. When the length of its altitude is 20 cm and its area is 30 cm^(2) , find the rate of change of its base.

In triangleABC , AD is an altitude . If BC=8 cm and ar (ABC)=40 cm^2 , then AD= ______ cm.

In triangleABC , P,Q and R are the midpoints of AB, BC and CA respectively. If ar(ABC)=32 cm^2 , then ar(PQR)= ____ cm^2

In parallelogram ABCD, AB=8 cm. The lengths of altitudes corresponding to AB and AD are 4 cm and 5 cm respectively. Find the length of AD.

Delta ABC is an isosceles triangle in which BC = 8 cm and AB = AC = 5 cm. Then, area of Delta ABC = …………….cm^(2) .

In right angle triangle ABC, 8cm ,15 cm and 17 cm are the length of AB,BC and CA respectively , Then find sin A , cos A and tan A .

In triangleABC , P, Q and R are the midpoints of AB, BC and CA respectively . If ar(ABC)=____40 cm^2 , then ar(PBCR)= ____ cm^2

In triangleABC , point D lies on side BC. E is the midpoint of AD. Prove that, ar(EBC)= 1/2 ar(ABC)

In triangleABC , P, Q and R are the midpoints of AB, BC and CA respectively . If ar(PBQR)=36 cm^2 , then ar(ABC)=____ cm^2

In Delta ABC , AB = 20 cm, BC = 21 cm and the perimeter of Delta ABC = 70 cm. Find the area of Delta ABC using Heron's formula.