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प्रश्न
Area of triangle PQR is 100 cm2 as shown in the below figure. If altitude QT is 10 cm, then its base PR is ______.
विकल्प
20 cm
15 cm
10 cm
5 cm
उत्तर
Area of triangle PQR is 100 cm2 as shown in the below figure. If altitude QT is 10 cm, then its base PR is 20 cm.
Explanation:
We know that, area of triangle =
From the question, it is given that, area of triangle PQR = 100 cm2
Height of the triangle = 10 cm = altitude
Therefore, area of triangle =
100 =
PR =
PR =
PR = 20 cm
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