C-07-Q098mediumsingle_mcq

From the options $60^\circ$ & $36^\circ$ , $40^\circ$ & $50^\circ$ , $30^\circ$ & $70^\circ$ , $80^\circ$ & $20^\circ$ , the valid pair of two acute angles of a right-angled triangle is—

a $60^\circ$ and $36^\circ$
b $40^\circ$ and $50^\circ$
c $30^\circ$ and $70^\circ$
d $80^\circ$ and $20^\circ$

ব্যাখ্যা

The two acute angles of a right triangle must add to $90^\circ$ , and only $40^\circ + 50^\circ = 90^\circ$ satisfies this. The other pairs do not sum to $90^\circ$ , so they cannot be the acute angles of a right-angled triangle.

এই অধ্যায়ের আরও প্রশ্ন

Practical Geometry — সব প্রশ্ন দেখুন (150টি) →

From the options $60^\circ$ & $36^\circ$ , $40^\circ$ & $50^\circ$ , $30^\circ$ & $70^\circ$ , $80^\circ$ & $20^\circ$ , the valid pair of two acute angles of a right-angled triangle is—

60^\circ

and

36^\circ

40^\circ

and

50^\circ

30^\circ

and

70^\circ

80^\circ

and

20^\circ

From the options 60∘60^\circ60∘ & 36∘36^\circ36∘, 40∘40^\circ40∘ & 50∘50^\circ50∘, 30∘30^\circ30∘ & 70∘70^\circ70∘, 80∘80^\circ80∘ & 20∘20^\circ20∘, the valid pair of two acute angles of a right-angled triangle is—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

From the options 60∘60^\circ60∘ & 36∘36^\circ36∘, 40∘40^\circ40∘ & 50∘50^\circ50∘, 30∘30^\circ30∘ & 70∘70^\circ70∘, 80∘80^\circ80∘ & 20∘20^\circ20∘, the valid pair of two acute angles of a right-angled triangle is—

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

From the options $60^\circ$ & $36^\circ$ , $40^\circ$ & $50^\circ$ , $30^\circ$ & $70^\circ$ , $80^\circ$ & $20^\circ$ , the valid pair of two acute angles of a right-angled triangle is—

From the options $60^\circ$ & $36^\circ$ , $40^\circ$ & $50^\circ$ , $30^\circ$ & $70^\circ$ , $80^\circ$ & $20^\circ$ , the valid pair of two acute angles of a right-angled triangle is—