Question

Pls answer this fast, no. 9, 10 & 11

Answer 1

hey, here are your answers.....

9)
given, an obtuse angled isosceles triangle..

let angles be, A,B,C...

let angle B be obtuse... then A=C...
A = 30°.... then, C = 30°.....
therefore, B = 120°.....

then, other two angles are 30°,120°.....



10)
Minimum no.of acute angles of a triangle is 2.... because, in a right-angled triangle or in obtuse-angled triangle , no. of acute angles is 2.. so, minimum no. of acute angles in a triangle is 2...


11)
Sum of the angles of a quadrilateral is 360° i.e., 4 right angles....because, sum of supplementary angles is 180.... so, then, sum of angles in a quadrilateral is 4 right angle....




hope this helps you.....
thank you.....



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