Question

Using a protector and a ruler, draw a triangle PQR so that PQ = 4cm, ΔPQR = 100° ΔQPR = 30°​

Answer 1

To draw triangle PQR with sides PQ = 4 cm and angles PQR = 100° and QPR = 30°, use a ruler to draw the base and a protractor to measure and create the angles at points P and Q. Then connect these points to form the triangle.

Step-by-step explanation:

To construct a triangle PQR with the given dimensions using a ruler and protractor, follow these steps:

Draw a base line for PQ that is 4 cm long using the ruler.

• At point P, use the protractor to measure an angle of 100° from the line PQ, which will be the angle ΔPQR.
• At point Q, again use the protractor to measure an angle of 30° from line PQ in the opposite direction, which will be the angle ΔQPR.

From where these two angles intersect, draw lines back to points P and Q to form the triangle PQR.

To measure the magnitude and direction of resultant vector R if necessary, use the ruler for length and the protractor to measure the angle relative to a reference axis, as shown in various figures concerning vector measurements.

Magnitude and direction are common vector properties, often used in physics problems.