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Quadrilaterals

63.If P(0,1,2...

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63.If P(0,1,2) , Q(4, -2, 1) and R(0,0,0) are three points , then angle PRQ is = ?

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Q. If P(0, 1, 2), Q(4, –2, 1) and O(0, 0, 0) are three points, then ∠POQ =

(a)

\frac{π}{6}

\frac{π}{4}

\frac{π}{3}

\frac{π}{2}

Q. If P(0, 1, 2), Q(4, -2, 1) and O(0, 0, 0) are three points, then -POQ =

P (3, 1), Q (6, 5)

R (x, y)

are three points such that the angle

P R Q

is a right angle and the area of

△ R Q P = 7

, then 4x-3y+5 is equals to

P and Q are the mid-points of sides AB and BC of triangle ABC respectively and R is the mid-point of AP, then ar ( $△$ PRQ) is equal to

Q. In fig sides QP and RQ of

Δ

PQR are produced to .the points S and T respectively. If

∠ S P R = 105^{\circ} ∠ P Q T = 110^{\circ}

∠ P R Q

.

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