ANSWER : b=√2a

Explanation : In a parallelogram PQRS angle P is four times of angle Q,then the measure of ∠R is opt1:36° opt2:72° opt3:130° opt4:144° ans: 144° Exp: PQRS-Parallelogram P=4∟Q but ∟P+∟Q =180 4∟Q+∟Q=180 ∟Q=180/5 =36° ∟R=180-∟Q=180°-36°=144°

ANSWER : 432 cm

Explanation : : Let the sides of the triangle be 3x,4x,5x(since they are in ratio 3:4:5) Area =1/2 x base x height => 7776 =1/2 x (3x) x (4x) => x=36 Perimeter =(3x + 4x + 5x)=12x =12 x 36 =432 cm

ANSWER : 45°

Explanation : : Let the angle be 'Ѳ' By the given conditions. 3(90°-Ѳ)=180-Ѳ => Ѳ=45°

ANSWER : a²+b²+c²

Explanation : : m-a²/ b²+c² + m-b² / c²+a² + m-c²/ a² + b² =3 => a,b,c are cyclic in order we have m-a² / b²+c² = m-b² / c²+a² = m-c²/a²+b² =1 m=a²+(b²+c²)=a²+b²+c²

ANSWER : -1

Explanation : : 2+x√3=1/2+√3 =1/2+√3 x 2-√3 / 2-√3 =2-√3 / 4-3 = 2-√3 2 + x√3=2-√3