Sec One Express Mathematics ICT Lesson Chapter 7

Sec One Express Mathematics ICT Lesson Chapter 7: Angles and Parallel Lines 7. 2 Angles A) Angles and Measurements

We can measure a corner of Louvre Museum in Paris, France. B A Le us name the angle The unit of angle Example: C

Sec One Express Mathematics ICT Lesson 7. 2 Angles B) Types pf Angles

Here are more examples types of angles Complementary angles A B C Note: If the sum of two angles adds up to 90 o D

Sec One Express Mathematics ICT Lesson WHAT HAVE YOU LEARNT?

Let us try this Note: This is a complementary angle where the two angles adds up to 90 o

Sec One Express Mathematics ICT Lesson WHAT HAVE YOU LEARNT?

Let us try this…

Sec One Express Mathematics ICT Lesson PROPERTIES OF ANGLES D E Here A B C

Sec One Express Mathematics ICT Lesson WHAT HAVE YOU LEARNT?

Let us try this The sum of adjacent angles on a straight line is 180 o.

Sec One Express Mathematics ICT Lesson Sum of all angles at a point is o 360 Here 63 o+ 50 o + 75 o + 1100 + c = 360 o Therefore c = 137 o Sum of all angles adds to 360 o

Sec One Express Mathematics ICT Lesson When two straight lines intersect, the vertically opposite angles are equal. S P o Reason: Vertically opposite angles. Q R

Sec One Express Mathematics ICT Lesson WHAT HAVE YOU LEARNT?

Sec One Express Mathematics ICT Lesson Activity I Click on the following link to recall the types of angles. http: //www. mathsisfun. com/angles. html

Ace-Learning Activity • Log on to your Ace-Learning account and follow the instructions

Sec One Express Mathematics ICT Lesson Content Hub -> Exploratory Activities

Sec One Express Mathematics ICT Lesson Exploratory Activities: Geometry -> Complete these 1 Adjacent angles on a straight line 2 Angles at a point 3 Vertically opposite angles

Sec One Express Mathematics ICT Lesson Exploratory Activities: Alternate Angles Explore the following from Ace-learning 1 Adjacent angles on a straight line 2 Angles at a point 3 Vertically opposite angles Follow the activities in this order – Exploration, Understanding & Application!

Sec One Express Mathematics ICT Lesson HAVE FUN!