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    Our shared values in Y5: To care for myself and others by making sure we are all safe and happy. To be honest in all we do/say. We always work hard and try our best. We listen carefully and thoroughly. We make sure we are always giving our best, so everyone else can be the best that they can be. We look after our property.
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Y5’s have been learning about Area and Perimeter and today we had a little investigation, which was fun and ‘different‘. We learnt about the area of a triangle! The formula we used:

A=1/2xbxh =4cm x 5cm = 20cm2

We first drew 2  isosceles triangles with the height of 3 units and worked out the area. Then we drew two more with the height of 4 units, etc.  What some Y5’s  are going to find out, over the weekend, is to see what will happen if you keep the base each time the same length. We hope they will come back on Monday with some ‘discovery’ they’ve made. A second investigation was to draw a hexagon and add units to the sides, instead of the height.

We also learnt the area of the triangle is half the area of the rectangle.

Look at the triangle ‘inside’ the rectangle. If you multiply the base by the perpendicular height, you get the area of a rectangle. 

So to find the area of a triangle, you can also multiply the base by the perpendicular height and divide by two. Area = (b × h)/

(8 × 5)/2 = 40/2 = 20cm2


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