In right Angled triangle LMN,if hypotenuse ,LN=18 , lm = 9 then what is measure of angle L
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LM=9cm
MN=12cm
LN=15cm
∴PM=4.5cm
QN=7.5cm
And we know that the line joining the mid points of the two sides of a triangle is parallel to the third side and is equal to half of it.
∴PQ=21MN=6cm
(i)Perimeter of trapezium MNQP=(4.5+7.5+12+6)
=24+6
=30cm
(ii)Area of trapezium=21×(sum of parallel sides)× (height)
=21×(12+6)×4.5=9×4.5
=40.5cm

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Answer:
measure of the angle L will be 45⁰
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