Question

3.4. calculate the value of angle b, using the properties of a parallelogram. (2)

question four - transformation geometry 10 marks
4.1. rotate the shape 90°clockwise about the origin on the graph. (2)

Explanation:

Step1: Use the property of adjacent angles in a parallelogram

In a parallelogram, adjacent angles are supplementary. That is, \(\angle B+\angle C = 180^{\circ}\)

Step2: Solve for \(\angle B\)

Given \(\angle C=121^{\circ}\). Substitute into the equation \(\angle B = 180^{\circ}-\angle C\)
\(\angle B=180^{\circ}- 121^{\circ}\)

Answer:

\(59^{\circ}\)