If the area of a triangular piece of cardboard is 90 cm², then the length of altitude corresponding to the 20 cm long base is ______ cm.
Solution:
Given, the area of a triangular piece of cardboard is 90 cm².
We have to find the length of the altitude corresponding to the 20 cm long base.
Area of triangle = 1/2 × base × altitude
90 = 1/2 × 20 × altitude
90 = 10 × altitude
Altitude = 90/10
= 9 cm
Therefore, the altitude is 9 cm.
✦ Try This: If the area of a triangular piece of cardboard is 100 cm², then the length of altitude corresponding to the 50 cm long base is _____ cm.
Given, the area of a triangular piece of cardboard is 100 cm².
We have to find the length of the altitude corresponding to the 50 cm long base.
Area of triangle = 1/2 × base × altitude
100 = 1/2 × 50 × altitude
100 = 25 × altitude
Altitude = 100/25
= 4 cm
Therefore, the altitude is 4 cm.
☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 11
NCERT Exemplar Class 7 Maths Chapter 9 Problem 46
If the area of a triangular piece of cardboard is 90 cm², then the length of altitude corresponding to the 20 cm long base is ______ cm.
Summary:
If the area of a triangular piece of cardboard is 90 cm², then the length of altitude corresponding to the 20 cm long base is 9 cm.
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