how do you find the area of trapezoid?
▎sine, cosine and tangent.
trapezoid直角梯形isosceles trapezoid等腰梯形perimeter周长area
moveable points: t, center of circle
secant to tangent lines
Tips:Do Not Provide
Personal Loans: Go Easy On Your Finances
Finance, Finance, Finance, Foreign Exchange, Stocks, Currency Circle, Venture Capital, Bitcoin, ICO...