Page 110 - Maths Skill - 3

108 Maths

Diagonals: AC and BD

AB = DC and AD = BC (Opposite sides are equal.)

Challenge Fact-o-meter
I’m long and straight, never bending or round, The line segment joining
In geometry class, I’m known for endless straight track, the opposite vertices of
Drawn with a ruler, I’m easy to see, What am I? the rectangle is called its
Can you tell my name? diagonal.

Square

A square has 4 sides, 4 corners and 2 diagonals. All sides of a square are equal.

Here, PQRS is a square. Side
S R
Sides: PQ, QR, RS and SP Diagonals

Corners/Vertices: P, Q, R and S
Diagonals: PR and QS P Q

PQ = QR = RS = SP (All sides are equal.) Corner/Vertex

Triangle A

A triangle has 3 sides and 3 corners. Side

Here, ABC is a triangle.
B C
Sides: AB, BC and CA Corner/Vertex

Corners/Vertices: A, B and C

Circle radius

A circle has no sides and no corners. Every circle has a centre and
radius. O Centre

Here, O is the centre of circle.

Corners and their Types Corner Side Corner

Many things around us have corners.
Look at this table.

It has 4 corners. Side Side
A corner is a point where two straight lines

meet. Every straight line represents a side. So,
in the figure there are 4 corners. Corner Corner
Side