CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard

CBSE Class 10 Sample Paper for 2021 Boards - Maths Basic →
Maths Class 10
Solutions of Sample Papers for Class 10 Boards

Question 8 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard - Solutions of Sample Papers for Class 10 Boards

Last updated at August 14, 2026 by

If PQ = 28cm, then find the perimeter of ∆PLM

If PQ=28cm, then find the perimeter of ∆PLM - CBSE Class 10 Sample Pap

Question 8 - CBSE Class 10 Sample Paper for 2021 Boards - Maths Standard - Part 2

Remove Ads
Teachoo · Class 10 Explore Class 10

Transcript

Question 8 If PQ = 28cm, then find the perimeter of ∆PLMSince Length of tangents drawn from external point are equal PQ = PT PL + LQ = PM + MT Since Length of tangents drawn from point L and Mare equal PL + LN = PM + NM Now, Perimeter Δ PLM = PL + LM + PM = PL + LN + NM + PM = PL + LN + PL + LN = 2(PL + LN) = 2(PL + LQ) = 2 × PQ = 2 × 28 = 56 cm

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.