Question

(b) যদি
a
c
b+c-a c+a-b a+b-c
সমান্তর শ্রেণিভুক্ত হয়,
b
1 1 1
তবে দেখাও যে,
a a b c
সমান্তর শ্রেণিভুক্ত হবে।​

Answer 1

Answer:

ī

Step-by-step explanation:

To prove: MNOP is a rectangle.

In parallelogram ABCD

∠A=∠D=90

∘

[they form a straight line]

∴IN△AMD,∠M=90

∘

∠M=∠N=90

∘

[they form a straight line]

Similarly,

∠M=∠P=90

∘

And

∠P=∠O=90

∘

∴∠MPO=∠PON∠ONM=∠NMO=90

∘To prove: MNOP is a rectangle.

In parallelogram ABCD

∠A=∠D=90

∘

[they form a straight line]

∴IN△AMD,∠M=90

∘

∠M=∠N=90

∘

[they form a straight line]

Similarly,

∠M=∠P=90

∘

And

∠P=∠O=90

∘

∴∠MPO=∠PON∠ONM=∠NMO=90

∘

∴ MNOP is a rectangle. [A rectangle is a parallelogram with one angle 90

∘

]

∴ MNOP is a rectangle. [A rectangle is a parallelogram with one angle 90

∘

]