Samacheer Kalvi Class 4 Maths Solutions Term 1 Chapter 1 Geometry Exercise 1.2

Tamilnadu Samacheer Kalvi 4th Maths Solutions Term 1 Chapter 1 Geometry Ex 1.2

A. Fill In The Blanks.

(i) All closed four sided figures are called _______.
Answer: quadrilateral.
In simple words: A quadrilateral is a shape that has exactly four sides that are all connected.

🎯 Exam Tip: Remember that a quadrilateral can have many different shapes, as long as it has four straight sides and is closed.

(ii) A _______ has four equal sides and equal diagonals.
Answer: square.
In simple words: A square is a special kind of quadrilateral where all four sides are the same length, and the lines connecting its opposite corners are also the same length. This makes it a very balanced shape.

🎯 Exam Tip: Both a square and a rhombus have four equal sides, but only a square has equal diagonals and 90-degree angles.

(iii) The opposite sides of a _______ are equal.
Answer: rectangle.
In simple words: In a rectangle, the side across from another side is always the same length. This gives it its common shape.

🎯 Exam Tip: A rectangle always has four right angles, even if its sides are not all equal.

(iv) A _______ has no sides.
Answer: circle.
In simple words: A circle is a perfectly round shape with no straight sides or corners at all. Every point on its edge is the same distance from its center.

🎯 Exam Tip: Think of a wheel or a coin; these are common examples of circles with no sides.

(v) Diagonals are equal in _______ and _______.
Answer: square, rectangle.
In simple words: The lines that connect opposite corners are equal in length for both squares and rectangles. This is a special property of these shapes.

🎯 Exam Tip: Remember that for parallelograms and rhombuses (which are not squares), the diagonals are not necessarily equal in length.

B. Write The Name Of The Sides And Diagonals.

Figure 1:
Answer:
Sides = AB, BC, CD, AD
Diagonals = AC, BD
In simple words: This shape is a rectangle labeled ABCD. Its outer lines are the sides, and the lines connecting opposite corners are the diagonals.

🎯 Exam Tip: When listing sides and diagonals, ensure you use the correct sequence of vertices for each line segment.

Figure 2:
Answer:
Sides = WX, XY, YZ, ZW
Diagonals = WY, XZ
In simple words: This figure is a parallelogram WXYZ. Its four straight edges are the sides, and the lines inside that connect opposite points are the diagonals.

🎯 Exam Tip: Pay attention to the order of letters when naming the sides and diagonals to accurately represent the figure.

Figure 3:
Answer:
Sides = PQ, QR, RS, SP
Diagonals = PR, QS
In simple words: This shape is a rhombus labeled PQRS. Its sides are the boundary lines, and the diagonals cut across it from one corner to the opposite one.

🎯 Exam Tip: All four sides of a rhombus are equal in length, but its diagonals might not be equal.

Figure 4:
Answer:
Sides = EF, FG, GH, EH
Diagonals = EG, FH
In simple words: This is a quadrilateral named EFGH. Its sides form the outer boundary, and its diagonals connect opposite corners.

🎯 Exam Tip: Always make sure to list all four sides and two diagonals for any quadrilateral.