Question

find the length of side BC if D and E are the midpoints of sides AB and AC of triangle ABC. which rule did you use to fine out the solution? state it?​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Refering figure,

DE=

2

1

BC

and AP=

2

1

AQ

Given, Area of ΔABC=60cm

2

or

2

1

×BC×AQ=60

or BC×AQ=120

∴ Area of ΔADE=

2

1

DE×AP

=

2

1

×

2

1

BC×

2

1

AQ=

8

1

BC×AQ

=

8

1

×120=15sq.cm.