A triangle has one angle 3π/10 and second angle is 66˚. Find the third angle in radian?

Geometry:

If ABCD is a cyclic quadrilateral with ∠A = 50 degrees, ∠B = 80 degrees then ∠C and ∠D are _____

Geometry:

If the Sum of the interior angles of a regular polygon is 14 right angles, then its number of sides, is ___

Geometry:

The angle formed by the hour-hand and the minute-hand of a clock at 2:15 pm is ____

Geometry:

The diameter of a garden roller is 1.4 m and it is 2m long. The area covered by the roller in 5 m revolutions is ____ (in m²)

Geometry:

The perimeters of two similar triangles are 30 cm and 20 cm respectively. If one side of the first triangle is 9 cm, determine the corresponding side of the second triangle?

Geometry:

The radii of a sphere and a right circular cylinder are 3 cm each. If their volumes are equal, then curved surface area of the cylinder is _____ (in cm²)

Geometry:

If the angles at a triangle are in the ratio 2:3:5, then the measures of the least angle of the triangle is ____

Geometry:

Area of regular hexagon with side ‘a’ is ____ (in a² sq unit)

Geometry:

A triangle has one angle 3π/10 and second angle is 66˚. Find the third angle in radian?

Geometry:

The angles of a triangle are (x+5) ˚, (2x - 3) ˚, (3x + 4) ˚. The value of x is____