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प्रश्न
Complete the activity.
योग
उत्तर
Length of base = y cm and length of side = x cm
Base of the triangle is 3cm more than twice its congruent sides.
∴ y = 2x + 3
∴ y – 2x = 3
i.e., – 2x + y = 3 ...(i)
Perimeter of the triangle is 35 cm.
∴ x + x + y = 35
∴ 2x + y = 35 ...(ii)
Adding equations (i) and (ii), we get
– 2x + y = 3
+ 2x + y = 35
2y = 38
∴ y = `38/2` = 19 cm
∴ Length of base = 19 cm
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