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Triangles inside Rectangles
Last updated at August 14, 2026 by Teachoo
Ganita Prakash Class 8 - Part 1, 2
Chapter 7 Class 8 - Area (Ganita Prakash II)
- Area of Rectangle and Square
- Perimeter vs Area
- Figure it out - Page 150-152
-
Area of Triangle
- Applications of Area of Triangle Formula
- Triangles between Parallel Lines with a Common Base
- Figure it out - Page 157-159
- Area of any Polygon
- Figure it out - Page 160
- Area of Parallelogram
- Area of Rhombus
- Area of Trapezium
- Figure it out - Page 169-170
- Areas in Real Life
Transcript
Triangles inside RectanglesNow, our book has asked us some questions Which triangle has a greater area: ∆ XDC or ∆YDC? Here, in both cases, We have same base CD XE is height of ∆ XDC, YE is height of ∆ YDC Since XE ⊥ CD, and YE ⊥ CD – both are same with value equal to AD = BC Thus, in both triangles, we have same base and height So, both triangles have the same area Thus, in both triangles, we have same base and height So, both triangles have the same area Find the area of ∆ XDC. Since XY ⊥ CD and AD ⊥ CD – they are both equal ∴ XY = AD = 4 Now, In ∆XDC, Height = XY = h = 4 Base = CD = b = 5 Area of ∆XDC = 1/2 × b × h = 𝟏/𝟐 × 5 × 4 = 5 × 2 = 10 square units Now, let’s do another question from the book
