Question

 In a right angle triangle the measure of first and second side is 3 and 4 respectively what is the measure of third side? ​

Answer 1

Step-by-step explanation:

Area of trapezium = 21×(sum of parallel sides)×altitude

Let other parallel side be x cm.

Then, 

21(x+6)×4=28

⇒2(x+6)=28

⇒x=14−6

⇒x=8cm