Page 137 - Math Genius C5

E:\Working\Orange_Education\Math_Genius_5\Open_Files\CHAP_06
\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

Mind Map Creative Thinking
math
geometry

Basic Geometric Shapes Angles Polygon

Point: A X Triangles
Line, Ray and Line Equilateral Triangle
Segment Vertex Arm
Line Angle Isosceles Triangle
O Arm Y
Ray Scalene Triangle
62° 90° 135° Acute-Angled Triangle
Acute angle Right angle Obtuse angle
Line Segment Right-Angled Triangle
240°
A B 180° Reflex angle 360° Obtuse-Angled Triangle
Straight angle Complete angle
Quadrilaterals
Intersecting lines, parallel Measuring an Angle Kite
lines and perpendicular lines
Intersecting Parallelogram
lines 60 70 80 90 90 100 110 60 120 Rhombus
80
70
50
40 140 130 120 110 100 50 130 140 A
Perpendicular 30 150 40 30 150 Rectangle
Lines 20 160 20 160
10 170 10 170 Square
180
0 0 180
B C
Parallel Lines Measuring ∠ABC
Circle
Drawing an Angle
80
70
70
140 130 120 110 100 80 90 90 100 70 110 60 120 50 130 140 130 120 110 100 90 90 100 70 110 60 120 50 130 C Radius
80
80
60
60
50
50
40 40 140 40 40 140 C
30 150 30 150 30 150 30 150 Diameter
A B 20 160 20 160 20 160 20 160 40°
10 170 10 170 10 170 10 170
0 180 0 180 0 180 0 180 A B
A B A B
Logical Thinking
Mental Maths
Compare the given angles and write their names in ascending order of
their measures.
S
A D
P T R
B C Q R U S T E F

Critical Thinking
Challenge Question

A bicycle wheel has 48 spokes. Find the angle formed between two consecutive
spokes.

Mathematics-5
Mathematics-5 135135