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RIGHT ANGLED TRIANGLES

RIGHT ANGLED TRIANGLES. A. HYPOTHENUSE. HYPOTHENUSE. OPPOSITE. ADJACENT. 90 0. A. 90 0. ADJACENT. OPPOSITE. Sin , Tan , Cos. Formulae. S illy O ld H arry. C aught A H erring. T rawling O ff A merica. THE ANGLE OF ELEVATION AND DEPRESSION.

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RIGHT ANGLED TRIANGLES

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  1. RIGHT ANGLED TRIANGLES A HYPOTHENUSE HYPOTHENUSE OPPOSITE ADJACENT 900 A 900 ADJACENT OPPOSITE

  2. Sin , Tan , Cos. Formulae Silly Old Harry Caught AHerring Trawling Off America

  3. THE ANGLE OF ELEVATION AND DEPRESSION (a) Angle of depression = Angle looking down (b) Angle of elevation = Angle looking up depression elevation

  4. QUESTIONS ON RIGHT ANGLED TRIANGLES Example 1 A plane takes of at an angle of 200 to the level ground. After flying for 100m how high is it off the ground. 100m height 900 200

  5. 100m HYP opp height 900 200 In this we are given the Hyp. And we are looking for the Opp So we use the Sin Formula

  6. 14m 10m

  7. 10m 8m

  8. Hyp = 13 x Adj = 5 Note: If given ratio always draw right angled triangle

  9. STEP 1. With set square construct a right angle STEP 2 Mark in the letter A along the bottom line STEP 3 Make this opposite line 2 units with a compass STEP 4 From this point on the vertical line measure a distance of 5 units to the bottom line. ( this is the Hyp.) 5 opp 2 A

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