Video: Yuav ua li cas koj pom cov kaum sab xis ntawm lub isosceles trapezoid?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov hauv paus (sab saum toj thiab hauv qab) ntawm ib isoscelestrapezoid cov yog thaum uas tig mus. Sab nraud ntawm ib qho isoscelestrapezoid cov yog tib qhov ntev (congruent). Cov lub kaum sab xis ib sab ntawm lub hauv paus yog tib qhov loj / ntsuas (congruent).
Hais txog qhov no, cov kaum sab xis ntawm lub isosceles trapezium puas sib npaug?
Cov puag cov ces kaum ( lub kaum sab xis tsim nruab nrab ntawm cov uas tsis yog-parallel sab thiab parallel sab) yog sib npaug hauv ib isosceles trapezoid . Diagonals ntawm ib isoscelestrapezoid cov yog sib npaug nyob rau hauv ntev. Qhov sum ntawm opposite lub kaum sab xis hauv ib isosceles trapezoid yog 180 degrees.
Qhov thib ob, koj ua pov thawj li cas ntawm isosceles trapezoid? THEOREM: Yog hais tias lub quadrilateral (nrog ib txheej ntawm parallelsides) yog ib qho isosceles trapezoid , nws ob txhais ceg yog congruent. THEOREM: (converse) Yog a trapezoid muaj ob txhais ceg, nws yog isosceles trapezoid . THEOREM: Yog hais tias lub quadrilateral yog ib isosceles trapezoid , cov diagonals yog congruent.
Kuj tseem paub, dab tsi yog cov khoom ntawm isosceles trapezoid?
Convex polygon Cyclic
Koj pom lub kaum sab xis uas ploj lawm li cas?
Txhawm rau txiav txim siab ntsuas qhov tsis paub lub kaum sab xis , nco ntsoov siv tag nrho cov lej ntawm 180 °. Yog ob lub kaum sab xis Muab, ntxiv rau lawv ua ke thiab rho tawm ntawm 180 °. Yog ob lub kaum sab xis yog tib yam thiab tsis paub, rho tawm cov paub lub kaum sab xis ntawm 180 ° thiab ces faib los ntawm 2.
Pom zoo:
Cov kab lus hloov sab hauv cov ces kaum piav qhia txoj haujlwm ntawm ob lub kaum sab xis li cas?
Hloov sab hauv cov ces kaum yog tsim los ntawm ib tug transversal intersecting ob parallel kab. Lawv nyob nruab nrab ntawm ob qho tib si kab tab sis nyob rau sab nraud ntawm lub transversal, tsim ob khub (plaub tag nrho cov ces kaum) ntawm cov ces kaum sab hauv. Hloov cov ces kaum sab hauv yog congruent, txhais tau tias lawv muaj qhov sib npaug
Puas yog cov kaum sab xis ntawm lub isosceles trapezoid congruent?
Lub hauv paus (sab saum toj thiab hauv qab) ntawm lub isosceles trapezoid yog sib npaug. Sab nraud ntawm ib qho isosceles trapezoid yog tib qhov ntev (kev sib haum xeeb). Lub kaum sab xis ntawm ob sab ntawm lub hauv paus yog tib qhov loj / ntsuas (cuam tshuam)
Yuav ua li cas koj pom lub tangent ntawm lub kaum sab xis ntawm lub voj voog?
Lub voj voog chav tsev muaj ntau qhov sib txawv uas txhua tus muaj qhov sib thooj ntawm lub voj voog. Thecoordinates ntawm txhua lub ntsiab lus muab peb txoj hauv kev los nrhiav qhov tangent ntawm txhua lub kaum ntse ntse. Lub tangent ntawm lub kaum sab xis yog sib npaug rau y-coordinate muab faib los ntawm x-coordinate
Dab tsi yog kev sib raug zoo ntawm sab nrauv thiab sab hauv lub kaum sab xis ntawm daim duab peb sab?
Cov kaum sab hauv yog hu ua Sab hauv cov ces kaum. Cov lej ntawm cov kaum sab hauv ntawm daim duab peb sab yog ib txwm 180 degrees. Lub kaum sab nrauv yog lub kaum sab xis ntawm ib sab ntawm ib qho duab, thiab ib txoj kab txuas ntxiv los ntawm sab tom ntej. Qhov sib npaug ntawm lub kaum sab nrauv thiab nws lub kaum sab hauv uas nyob ib sab kuj yog 180 degrees
Yuav ua li cas koj pom lub sab hauv ntawm lub kaum sab xis?
Yuav Ua Li Cas Nrhiav Sab Hauv Lub Kaum Qhov sum ntawm cov ces kaum hauv daim duab peb sab ib txwm sib npaug 180o. Squares muaj 4 qhov sib npaug sab thiab cov lej ntawm cov ces kaum ib txwm sib npaug 360o. Txhawm rau nrhiav qhov ntsuas ntawm cov ces kaum sab hauv hauv ib lub xwmfab, koj faib cov lej ntawm cov ces kaum (360o) los ntawm tus lej ntawm sab (4)