Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
463 views
in Mensuration by (100k points)
closed by
समचतुर्भुज का एक कोण `60^(@)` है। यदि समचतुर्भुज की भुजा 8 cm हो तब बड़े विकर्ण की लम्बाई ज्ञात करें?
A. `8sqrt(3)cm`
B. `8 cm`
C. `4 sqr(3)`
D. `8/(sqrt(3))` cm

1 Answer

0 votes
by (101k points)
selected by
 
Best answer
Correct Answer - A
image
Let `/_ABC=60^(@)`
`/_OBC=30^(@)`
`:.` समचतुर्भुज के विकर्ण कोणसमद्विभाजक होते है।
In right `DeltaBOC`
`(OB)/(BC)=cos30^(@)`
`(OB)/8=(sqrt(3))/2`
`OB=4sqrt(3)`
`:. BD=2xxOB`
`=2xx4sqrt(3)`
`=8sqrt(3)cm`

Related questions

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...