Question

9. a. Construct triangle ABC in which Bc = 12.5cm, <B=800

abd <C=400

b. Consrtuct triangle PQR such that PQ=6.5CM,<P=50,<Q=650​

Answer 1

➤ Correct Questions :-

1. Construct a ∆ABC in which BC = 12.5 cm, ∠B = 80° and ∠C = 40°.
2. Construct a ∆PQR such that PQ = 6.5 cm, ∠P = 50° and ∠Q = 65°.

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$\dashrightarrow$ Steps (1) :-

• First, draw a line segment BC of 12.5 cm.
• Next, take a protractor and keep it's mid-point on the point B and draw a ray measuring 80°.
• Again, take a protractor and keep it's mid-point on the point C and draw a ray measuring 40°.
• Join both the rays by extending them until they meet. The point where both the ray meets is named as point A.

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$\dashrightarrow$ Steps (2) :-

• First, draw a line segment PQ of 6.5 cm.
• Next, take a protractor and keep it's mid-point on the point P and draw a ray measuring 50°.
• Again, take a protractor and keep it's mid-point on the point Q and draw a ray measuring 65°.
• Join both the rays by extending them until they meet. The point where both the ray meets is named as point R.

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$\dashrightarrow$ Instruments used :-

• Ruler :- The ruler is used to draw the line segments of accurate measurements and also the drawn lines should be straight always.
• Protractor :- The protractor is used to draw the rays of accurate measurements of degrees. It's also used to measure the angles given.