N'ime akwụkwọ a, anyị ga-atụle nkọwa na ihe ndị bụ isi nke trapezoid isosceles.
Cheta na a na-akpọ trapezoid ndị isosceles (ma ọ bụ isosceles) ọ bụrụ na akụkụ ya hà nhata, ntụgharị AB = CD.
Ngwongwo 1
Akụkụ dị na ntọala ọ bụla nke trapezoid isosceles hà nhata.
- ∠DAB = ∠ADC = a
- ∠ABC = ∠DCB = b
Ngwongwo 2
Nchikota nke akụkụ dị iche nke trapezoid bụ 180 Celsius.
Maka foto dị n'elu: α + β = 180°.
Ngwongwo 3
The diagonals nke isosceles trapezoid nwere otu ogologo.
AC = BD = d
Ngwongwo 4
Elu nke trapezoid isosceles BEwedata n'elu isi nke ogologo ogologo AD, na-ekewa ya n'ime akụkụ abụọ: nke mbụ hà nhata na ọkara nchikota nke ntọala, nke abụọ bụ ọkara ọdịiche ha.
Ngwongwo 5
Akụkụ ahịrị MNijikọ etiti etiti nke ntọala nke isosceles trapezoid bụ perpendicular na ntọala ndị a.
A na-akpọ ahịrị na-agafe na etiti etiti nke ntọala nke trapezoid isosceles ya axis nke symmetry.
Ngwongwo 6
Enwere ike ịgbanye okirikiri gburugburu trapezoid isosceles ọ bụla.
Ngwongwo 7
Ọ bụrụ na nchikota nke bases nke trapezoid isosceles hà nhata okpukpu abụọ n'ogologo n'akụkụ ya, mgbe ahụ enwere ike idenye okirikiri n'ime ya.
Radius nke okirikiri dị otú ahụ hà nhata na ọkara ịdị elu nke trapezoid, ntụgharị R = h/2.
Cheta na: Enyere ihe ndị ọzọ na-emetụta ụdị trapezoid niile na akwụkwọ anyị -.