# Ch. 9 Overview

Recap ch. 9
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Slide 1: Slide
WiskundeMiddelbare schoolvwoLeerjaar 1

This lesson contains 17 slides, with interactive quizzes and text slides.

## Items in this lesson

Recap ch. 9

#### Slide 1 -Slide

What is the midpoint?
A
The middle of a line segment
B
The point of intersection of the medians
C
The point of intersection of the altitudes
D
None of these

#### Slide 3 -Slide

If you draw a median from point A. Where does the median intersect the x-axis?
A
(0, 0)
B
(2, 0)
C
(3, 0)
D
(5, 0)

#### Slide 4 -Quiz

If you draw an altitude from point A. Where does the it intersects the x-axis?
A
(0, 0)
B
(2, 0)
C
(3, 0)
D
(5, 0)

#### Slide 5 -Quiz

Right-angled triangle
Equilateral triangle
Isosceles triangle

#### Slide 7 -Open question

Can you draw a triangle that has
two obtuse angles?
A
Yes
B
No

#### Slide 12 -Open question

The sum of the angles in a quadrilateral are always ...

#### Slide 13 -Open question

If angle D = 80 degrees. What is angle A then?

#### Slide 14 -Open question

Calculate angle S1.
+ Calculations

#### Slide 16 -Slide

Homework
Do exercise 1, 2, 3, 8, 9 and 10 of the 'Mixed exercises'