- A
- B
- C
- D
Step-by-Step Solution
Perimeter = sum of the three sides. terms: . Constants: 1 − 4 + 6 = 3. So the perimeter is cm. Treating −4 as +4 gives ; doubling the sum (a rectangle habit) gives ; forgetting the lone in gives .
Answer: C)
The sides of a triangle are cm, cm and cm. Find its perimeter.
Class 8Algebraic Expressions and IdentitiesAlgebra
Key idea: Adding and subtracting expressions
Combine **like terms only** — same variables and same powers.
Example: .
For subtraction, distribute the minus sign first:
.
Example: .
For subtraction, distribute the minus sign first:
.
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