## Q- Mention the two broad categories of devices that use solar energy?

Chapter: Concept of Measurement of Angles

## Q- Which fuel has the highest calorific value?

Chapter: Concept of Measurement of Angles

## Q- If the measure of three angles of quadrilateral are π/3, 5π/6 and 90° respectively, then let us determine and write the sexagesimal and circular values of fourth angle.

Chapter: Concept of Measurement of Angles

## Q- The base BC of the equilateral triangle ABC is extended upto the point E so that CE = BC by joining A, E, let us determine the circular values of the angles of triangle ΔABC.

Chapter: Concept of Measurement of Angles

## Q- The ratio of two angles subtended by arc of unequal length at the centre is 5:2 and if the sexagesimal value of the second angle is 30° , then let us determine the sexagesimal value and the circular value of the first angle.

Chapter: Concept of Measurement of Angles

## Q- A rotating ray makes an angle -5 1/12π. Let us write by calculating, in which direction the ray has completely rotated and there after what more angle it has produced.

Chapter: Concept of Measurement of Angles

## Q- I have drawn an isosceles triangle ABC whose included angle of two equal sides is ∠ABC = 45° ; the bisector of ∠ABC intersects the side AC at the point D. Let us determine circular values of ∠ABD ∠BAD, ∠CBD, and ∠BCD.

Chapter: Concept of Measurement of Angles

## Q- If the ratio of three angles of a triangle is 2:3:4, then let us determine the circular value of the greatest angle.

Chapter: Concept of Measurement of Angles