Eric Nicholas K's answer to Ugandan Knuckles's Secondary 3 E Maths Singapore question.
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I did this question in radian angle form.
Date Posted:
5 years ago
In radian form, formula for area of sector is 0.5 * radius * radius * theta.
Area of a triangle, given two lengths and the included angle, is 0.5 * length 1 * length 2 * sin theta. In this case, both lengths are radii. The angle used must be in radians for consistency.
This question can be done in degree form as well like Sin Yee does, or using the method that Mei Xuan uses.
Area of a triangle, given two lengths and the included angle, is 0.5 * length 1 * length 2 * sin theta. In this case, both lengths are radii. The angle used must be in radians for consistency.
This question can be done in degree form as well like Sin Yee does, or using the method that Mei Xuan uses.
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