Free space in the garden

The grandfather's free space in the garden was in the shape of a rectangular triangle of 5 meters and 12 meters in length. He decided to divide it into two parts and the height of the hypotenuse. The smaller part creates a rock garden, for the larger sows grass. How many square meters has a larger part?

Correct answer:

S =  25.5621 m2

Step-by-step explanation:

a=5 m b=12 m  c=a2+b2=52+122=13  S1=2a b=25 12=30 m2 S1 = 2c v  v=c2 S1=132 30=13604.6154 m  c c1 = a2 c c2 = b2  c1=ca2=1352=13251.9231 m c2=cb2=13122=1314411.0769 m  S=2c2 v=213144 1360=1694320 m2=25.5621 m2

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