Home
Class 9
MATHS
ABC is an equilateral triangle. D and E ...

ABC is an equilateral triangle. D and E are the mid-points of AB and AC. Then `angleADE=`

A

`30^@`

B

`45^@`

C

`60^@`

D

`75^@`

Text Solution

Verified by Experts

The correct Answer is:
c
Promotional Banner

Topper's Solved these Questions

  • THEOREMS ON TRANSVERSAL AND MID-POINTS

    CALCUTTA BOOK HOUSE|Exercise Short answer|10 Videos
  • THEOREMS ON TRANSVERSAL AND MID-POINTS

    CALCUTTA BOOK HOUSE|Exercise Long answer|14 Videos
  • THEOREMS ON TRANSVERSAL AND MID-POINTS

    CALCUTTA BOOK HOUSE|Exercise Example-12|1 Videos
  • THEOREMS ON CONCURRENCE

    CALCUTTA BOOK HOUSE|Exercise EXERCISE Long-answer type questions|17 Videos
  • TRIANGLE

    CALCUTTA BOOK HOUSE|Exercise EXERCISE-1.1 (Long-answer type question :)|14 Videos

Similar Questions

Explore conceptually related problems

B is a vertex of the isosceles triangle ABC. D and E are the mid-points of AB and AC. If BE and CD intersects each other at F prove that DeltaBDE=3DeltaDEF .

Three charges, each +q , are placed at the corners of an isosceles triangle ABC of sides 'BC and AC, 2a. D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is

DeltaABC and DeltaBDE are two equilateral triangles. If D is the mid-point of BC , then the ratio of the areas of DeltaABC and DeltaBDE is

ABC is a right angled triangle right angled at B. If P and Q are the mid - points of the sides overline(AB)andoverline(BC) respectively , then show that , 4(AQ^(2)+PC^(2))=5AC^(2) .

Delta ABC is an equilateral triangle . D is a point on the side BC such that BD = (1)/(3) BC . Prove that 7 AB^(2) = 9AD^(2)

D is the mid-point of BC of DeltaABC . E and O are the mid-points of BD and AE respectively. Then the area of the triangle BOE is-

ABC is a right triangle right angled at B. Let D and E be any points on AB and BC respectively. Prove that AE^(2) + CD^(2) = AC^(2) + DE^(2) .