Question

in a triangle PQR , angle Q=90° Angle R=60°, line PQ =12 cm Find line QR & PR​

Answer 1

Answer:

ANSWER

Step 1: Draw a line segment AB of 11cm

XY+YZ+ZX=11cm

Step 2: Using a protractor mark 30

∘

at A, i.e ∠PAB and ∠QBA as 90

∘

Step 3: Bisect 30

∘

at A, i.e ∠PAB and ∠QBA at point X.

Step 4: Join XZ and make XZ perpendicular to AB.

Step 5: Draw perpendicular bisector of AX i.e ST.

Step 6: Mark the point Y where ST and AB intersect. Join XY

∴ We get △XYZ

Answer 2

Answer:

QR=4√3 AND PR=8√3

Step-by-step explanation:

the given triangle PQR is a 30°60°90° right angled triangle...

therefore the side opposite to 60° angle ie pq is √3/2 of hypotenuse p pr...by cross multiplication you get pr and through pr you can find qr which is 1/2 of the hypotenuse...side opposite of 30° angle...

hope this helps