Home›MPPSC Forest›State Forest Service Mains Exam›Section 'B': Forestry and General Science›UNIT-10: Elementary Mathematics and General Mental Ability›Line and angles, parallels, triangles, congruence, inequalities, parallelograms, applications of parallels, bisectors, perpendiculars etc.›In a triangle ABC, ∠A = 100° and sides AB and AC are equal. Then

In a triangle ABC, ∠A = 100° and sides AB and AC are equal. Then value of ∠B is

20243M#mppsc-forest#pyq#mcq#2024
A.60°
B.50°Correct
C.40°
D.45°
Explanation & Solution

Correct Answer: (B) 50°

In triangle ABC, since AB = AC, the angles opposite to them are equal (∠B = ∠C). Given ∠A = 100°, the sum of angles is 180°, so ∠B + ∠C = 80°, which means ∠B = 80° / 2 = 50°.

हिंदी में प्रश्न एवं आदर्श उत्तर

एक त्रिभुज ABC में ∠A = 100° तथा भुजाएँ AB एवं AC बराबर हैं । तब ∠B का मान होगा

A.60°
B.50°सही
C.40°
D.45°

सही उत्तर: (B) 50°

त्रिभुज ABC में, चूंकि AB = AC है, इसलिए उनके सम्मुख कोण बराबर हैं (∠B = ∠C)। दिया गया है ∠A = 100°, त्रिभुज के कोणों का योग 180° होता है, अतः ∠B + ∠C = 80°, जिसका अर्थ है ∠B = 80° / 2 = 50°।

See this question in context →
Free Android App

Practice Better on the StatePYQ Mobile App

⚡ Error Diary · ⏱ Timed Mains Answer Pacer · 📴 Offline Revision Vault

Get it onGoogle Play