If AB=AC and angle A=100 , …

CBSE, JEE, NEET, CUET

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

Install Now

If AB=AC and angle A=100 , find angle B

Posted by Jesh Solanki 2 years, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Shubham Kumar Gupta 2 years, 1 month ago

Here, Given that ABC is a triangle. And ∠A = 100°, Also AB = AC. We know that if the two adjacent sides of a triangle is equal, then there opposite angles are also equal to each other. Now, ∵ AB = AC ∴ ∠B = ∠C = x (say). Now, we know that sum of all angles of a triangle is 180°, ∴ ∠A + ∠B + ∠C = 180° ; 100° + x° + x° = 180° ; 100° + 2x° = 180° ; 2x° = 180° - 100° ; 2x° = 80° ; x° = 80° ÷ 2 ; x° = 40°. Since, we know that x° = ∠B, Therefore ∠B = 40°.

2Thank You

ANSWER

Related Questions

What is 38747484±393884747

Posted by Alvin Thomas 3 months, 4 weeks ago

CBSE > Class 09 > Mathematics

0 answers

X³-12x²+39x-28

Posted by Sukhi Devasi 3 months, 4 weeks ago

CBSE > Class 09 > Mathematics

0 answers

The polynomial of the type ax²+bx+c,a=0 is called

Posted by Gnani Yogi 3 months, 4 weeks ago

CBSE > Class 09 > Mathematics

0 answers

2x+5y

Posted by Yash Pandey 3 months, 4 weeks ago

CBSE > Class 09 > Mathematics

0 answers

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by T Prudhvi 1 month, 1 week ago

CBSE > Class 09 > Mathematics