钝角三角形的勾股定理
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所属专题
Pythagorean Theorem
该范例演示了钝角三角形的勾股定理,涉及无理数边长的情况。通过构造直角三角形的斜边平方等于两腰平方和的性质,进一步探讨钝角三角形中斜边与两腰的关系。使用了线段、点、角度、交点等GeoGebra命令进行构造。适合初中及以上学生学习几何作图和勾股定理。
GeoGebra 命令及参数
Segment(A_1, B_1) → fSegment(A_1, B_1) → qTextfield(empty1) → ΕισΑΒ2Textfield(empty2) → ΕισAC2Textfield(empty3) → ΕισBC2Textfield(empty5) → ΕισAC2kaiBC2SelectedElement(L) → text5SelectedIndex(L) → vSelectedIndex(L1) → wPolygon(C, A, B) → poly1, b, c, a_1Angle(poly1) → α, β, γPolygon(A, C, 4) → poly2, d, e, g, h, D, EPolygon(C, B, 4) → poly3, i, j, k, l, F, GPolygon(B, A, 4) → poly4, m, n, p, r, H, ISegment(J, A) → aPoint(a) → KIntersect(n, p) → MSegment(K, M) → sPoint(s) → NIntersect(p, r) → OSegment(N, O) → tPoint(t) → PPoint(r) → QSegment(P, Q) → b_1Intersect(g, h) → TPoint(g) → UIntersect(k, l) → VPoint(k) → WSegment(M, R) → e_1Segment(A, S) → f_1Segment(Z, B) → g_1Point(e_1) → C_1Segment(O, C_1) → h_1Segment(A, D_1) → i_1Point(i_1) → E_1Segment(T, E_1) → k_1If(ans1 ≟ 37, true, false) → AB2Segment(U, F_1) → j_1Point(j_1) → G_1Intersect(e, l) → H_1Segment(G_1, H_1) → l_1Segment(H_1, J_1) → d_1Point(d_1) → K_1Segment(G, K_1) → m_1Point(m_1) → L_1Segment(L_1, W) → n_1Point(n_1) → M_1Segment(I_1, M_1) → c_1If(ans2 ≟ 13, true, false) → AC2If(ans5 ≟ 33, true, false) → AC2kaiBC2If(ans3 ≟ 20, true, false) → BC2