Samacheer Kalvi Class 5 Maths Solutions Term 1 Chapter 1 Geometry More Ques

Write True or False.

Question 1. Cuboid is covered by 6 rectangles
Answer: True
In simple words: A cuboid has six flat sides, and each of these sides is shaped like a rectangle. This makes it a common 3D shape found in many everyday objects.

🎯 Exam Tip: Remember that a cuboid's faces are always rectangular, while a cube's faces are always square.

Question 2. The height and slant height of the cone are unequal
Answer: True
In simple words: A cone has two different heights: one that goes straight up from the center of the base, and another that goes along its sloped side. These two heights are usually not the same length, with the slant height being longer.

🎯 Exam Tip: The perpendicular height, radius, and slant height of a cone form a right-angled triangle, so you can find any one if you know the other two using the Pythagorean theorem.

Question 3. The cube has 8 vertices
Answer: True
In simple words: A cube is a 3D shape, like a dice. It has 8 corners, and each corner is called a vertex.

🎯 Exam Tip: You can remember the properties of a cube by thinking of a common object like a dice: 6 faces, 12 edges, and 8 vertices.

Question 4. Sphere has vertices and edges
Answer: False
In simple words: A sphere is completely round, like a ball. It has no flat surfaces, no straight lines (edges), and no pointy corners (vertices).

🎯 Exam Tip: Shapes with curved surfaces, like spheres and cylinders, typically do not have vertices or edges in the same way that shapes with flat faces do.

Question 5. Rectangle is a 2-D shape
Answer: True
In simple words: A rectangle is a flat shape that you can draw on paper. It only has length and width, but no thickness, making it a two-dimensional shape.

🎯 Exam Tip: Remember that 2D shapes can only be drawn on a flat surface, while 3D shapes have depth and take up space.

Question 6. The angle 90° is called as The right angle in AABC is
(a) ∠A
(b) ∠B
(c) ∠C
Answer: (b) ∠B
In simple words: An angle that measures exactly 90 degrees is called a right angle. In the picture of triangle ABC, the square symbol at corner B shows that angle B is the right angle.

🎯 Exam Tip: Always look for the small square symbol at a vertex in a triangle; it is the universal sign for a right angle.

Question 7. In the following letters, which forms the acute angle?
Answer:

🎯 Exam Tip: When identifying angles formed by letters, remember an acute angle is less than 90 degrees.

Question 8. Hand of a clock at 3:00 shows ____ angle.
Answer: right
In simple words: When a clock shows 3:00, the hour hand points at 3 and the minute hand points at 12. These two hands form a perfect 'L' shape, which is a right angle (90 degrees).

🎯 Exam Tip: Visualize the clock hands at different times to understand the angles they form; 3:00, 6:00, and 9:00 are good starting points.

Question 9. Circle the obtuse
Answer: c.
In simple words: An obtuse angle is an angle that is wider than a right angle (more than 90 degrees) but not as wide as a straight line (less than 180 degrees). The angle shown in option 'c' is visibly wider than a typical corner.

🎯 Exam Tip: To easily identify obtuse angles, imagine if you could fit a square corner into the angle; if it's too wide, it's obtuse.

Question 10. In the following letters, which forms the acute angle?
(a) L
(b) V
(c) T
(d) I
Answer: (a) L
In simple words: An acute angle is a small angle, meaning it is less than 90 degrees. Out of the given options, the letter 'L' is identified as forming an acute angle in this context.

🎯 Exam Tip: Remember the definitions of acute (less than 90°), right (exactly 90°), and obtuse (greater than 90° but less than 180°) angles when identifying them in shapes or letters.