Question

Q.. Construct a quadrilateral PQRS in which angle P=120° ,
angle Q=80°, angle R=70° and
PQ=QR=5.2cm.

Please Help!!!​

Answer 1

Answer:

S=90°

HOPE IT HELPS YOU.

SUM OF ALL ANGLES OF QUADRILATERAL IS 360°

Answer 2

Step-by-step explanation:

Its very easy but lengthy

first find angle s

in quadrilateral , sum if all angle =360

P+Q+R+S = 360°

120+80+70+ S = 360

S= 360-270 = 90°

Now with the help of scale draw a line pq = 5.2cm

on your notebook.

Next take a protractor and measure the same length=5.2cm for QR as we know PQ=QR.

With the help of compass align the mid point of compass with Q such that the other side should overlap(fall right above the line PQ. Now, mark 80 in the compass and draw a line to that point,

with the help of your protractor cut the newly drawn line which should measure 5.2cm. Name that point R and now from R measure 70° and draw a light line so that you can erase the remaining parts later and from P mark 120 with the help of compass , now that the new lines intersect each other at point S,

measure your Angle S with your compass and if it is 90 ,,, viola !! you've done it.