Page 6 - Maths Skills - 7

An Explicit Edition Aligned with NEP 2020 & NCF-SE 2023

Learning Outcomes
Learning Outcomes
Awareness what will be Literacy � Line segment � Line
discussed in the chapter. Skills � Ray � Angle
� Types of angles � Pair of angles

Boot-Up (To Recapitulate Previous Knowledge of Concepts)
Boot-up
COMPETENCY BASED QUESTIONS
B. Fill in the Blanks Analytical It is just like a revise
1. An _____________ is formed when two rays have the same starting point. Skills section to recall the
2. A triangle is called _____________ if its two angles are equal. previous learning.
3. The longest side of a right angled triangle is called _____________.
4. A line that bisects a side or an angle is called _____________.

Fact-o-meter
Fact-o-meter � Two acute angles or two obtuse

It provides facts or Literacy angles can never form a linear pair.
knowledgeable information Skills � Supplementary angles form a
about the topic. linear pair it they are adjacent too.

Let’s Attempt Let's Attempt

Example 1: If the angles of a triangle are in the ratio It contains the solved
2 : 3 : 4, find the angles. Intellectual questions to prepare
Solution: Let the measures of the given angles be 2x, 3x Skills the learners for their
examinations.
and 4x. Then, 2x + 3x + 4x = 180º
or 9x = 180º
Therefore, the measures of the three angles are
2x = 2 × 20º = 40º, 3x = 3 × 20º = 60º,
Now we can say that subtract 4 from 2.
and 4x = 4 × 20º = 80º.
Exercise 10.1
Exercises
1. Fill in the blanks.
It contain the unsolved Intellectual
questions to check the Skills (i) Triangle has ______________ elements.
progress of the learner. (ii) A triangle has ______________ vertices, ______________ sides and
______________ angles.
(iii) All the points on the triangle as well as in the interior of the triangle form
______________ region.