Tamil Nadu Board of Secondary EducationSSLC (English Medium) (5 to 8) Class 8

In the figure, find AR - Mathematics

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Sum

In the figure, find AR

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Solution

∆AFI, ∆FRI are right triangles.

By Pythagoras theorem,

AF2 = AI2 – FI2

= 252 – 152

= 625 – 225

= 400

= 202

∴ AF = 20 feet.

FR2 = RI2 – FI2

= 172 – 152 

= 289 – 225

= 64

= 82

FR = 8 feet.

∴ AR = AF + FR

= 20 + 8

= 28 feet.

  Is there an error in this question or solution?
Chapter 5: Geometry - Exercise 5.3 [Page 180]

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Tamil Nadu Board Samacheer Kalvi Class 8th Mathematics Answers Guide
Chapter 5 Geometry
Exercise 5.3 | Q 9 | Page 180

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