Question

Q-5 Define: (any -2 /each-2.5 marks)

a) Obtuse angle

b) Cuboid

c) Isosceles triangle​

Answer 1

Answer:

a) An obtuse angle is a type of angle that is always larger than 90° but less than 180°. In other words, it lies between 90° and 180°. In the given figure, ∠XYZ shows an obtuse angle. It is an obtuse angle as it measures more than 90 degrees as shown: Some more examples of obtuse angle.

b) A cuboid is also a polyhedron having six faces, eight vertices and twelve edges. The faces of the cuboid are parallel. But not all the faces of a cuboid are equal in dimensions.

c) an isosceles triangle is a triangle that has two sides of equal length. The two equal sides are called the legs and the third side is called the base of the triangle.