K16
- Can help me with this question?
- Cher, what’s ur answer for this question
- Was in the psle paper I did earlier
- Hello
- Let me take a look at the question first.
- The base is the black line you drew in the diagram?
- Yesh
- Ok. Let's break down this question step-by-step
- The area of the shaded part is 5 squares. Assuming the dimensions of each small square is 1 cm²
- What is the total area of the shaded part?
- 5?
- Yes, you are correct!
- From your diagram, you can see that if I were to draw a triangle from the base to point A, B, C and D, they have the same base.
- So the only difference would be the "height" of the triangles
- Let's look through the points one by one.
A is less than 4. Let it be 3.5.
B is more than 4. Let it be 4.5.
C is 4
D is 3
Using the formula for the area of triangles, 1/2 x base x height
For triangle A: 1/2 x 1 x 3.5 = 1.75
B: 1/2 x 1 x 4.5 = 2.25
C: 1/2 x 1 x 4 = 2
D: 1/2 x 1 x 3 = 1.5 - Can you understand my workings?
- Yes I get it
- So the answer is B?
- Yes, you are right!
- Thank you!
Session ended by student.
Adeline Lee, 
