pls pls pls it's urgent tell the answer fast
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20) The sum of the acute angles of a right-angled triangle is 90˚
Let angles be 4x and 5x.
→ 4x+5x=90˚
9x=90
x=10
So, angles are:-
4x=40˚
5x=50˚
21) d^2 = 1250,d=sqrt[1250]
area of sq.= [side]^2 or [d^2]/2
A=1250/2=625sq. units
side=sqrt[625]=25units
22) L= 80cm
B= 60cm
Diagonal=
\sqrt {{l}^{2}+ {b}^{2} }
=√80^2+60^2
=√6400+3600
=√10000
=100 cm
So, 80+60=130
130-100
=30 cm to walk shorter
HOPE IT HELPS U MATE
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