IT IS JUST DISCUSSION,any land surveyor can give me area of this triangle below.

A Triangle ABC 60 BCA 60 and length AB IS EQUAL TO RADIOUS OF CRICLE WHOSE AREA IS 66/21 Squre meter

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you might find an answer to this (or have better results, posting more details) as a discussion in this group forum Formulas That Work

So without going to a calculator I can see that the circles area is the old fashioned 22 divided by 7 or as you put it 66/21 roughly known as Pi. So if Pi x r x r is the area of the circle then r, the side of the triangle, is 1. As the triangle is an equilateral triangle, the perpendicular height can be noted as the square root of 3. Remember the old 1,2,root3 for a 30,60,90 triangle. The area of the triangle is found by 1/2base x h. Therefore your triangle is 1/2 x root3. Root3 from memory (whats left of it) is roughly 1.732 so your triangle area is approximately 0.866m2. I hope this helps. Not bad for a 57 yr old.

i think its 0.866/2 sq.m,correct me if im wrong.

Thanks Nelson, I realised just after pressing the enter key. But was in the middle of 4 days of slashing the paddocks. I only had one more days worth of slashing to finish, so was going to correct it later. Glad you picked it up. Yes it should have been 1/2 x 1/2(root3). Sorry the excitement of doing puzzles just takes over. Have a good one. Kevin.

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