Question

m
n
3) Solve the following questions. (Any Four)
(08)
) ALMN - APQR, 9 x A(APQR)= 16 x A(ALMN). If QR = 20 then fin
MN
)
Draw a circle of radius 3.6 cm. Draw a tangent to the circle at any pois
on it without using the centre.
)
Determine whether the points P(9,-2) Q(-1,8) & R(3, 4) are collinear
not.
1
Prove that:
=seco+tano
seco-tane
Find the side & perimeter of a square whose diagonal is is 10 cm.
1.3 (A) Complete any one activity out of the following, (03)
In the adjoining figure, X is any point in the interior of triangle. Point
d to vertices of triangle seg PO || seg DE. seg QR || seg EF. Fill
OR .​

Answer 1

Answer:

When three points A,B and C are collinear, slope of line joining any two points (say AB) = slope of line joining any other two points (say BC).

Slope of the line passing through points (x1,y1) and (x2,y2) = y2-y1/x2-x1

Slope of the line passing through (−1,8) and (9,−2)=

−2−8/9−(−1) = 10/−10=−1.

Slope of the line passing through (9,−2) and (3,4)=

4−(−2)/3-9 = −6/6 =−1

Slope of both lines are same. Hence the given points are collinear.

Answer 2

∆LMN ~ ∆PQR, 9 x A(APQR)= 16 x A(ALMN). If QR = 20 then find MN.