Beth ydy polygon?
Siâp \({2D}\)
Siâp ag ochrau syth
Siâp \({2D}\) ag ochrau syth
Pa bolygon ydy hwn?
Triongl
Pentagon
Hecsagon
Beth ydy cyfanswm yr onglau mewnol mewn pentagon?
\[{360}^\circ\]
\[{450}^\circ\]
\[{540}^\circ\]
Beth ydy cyfanswm yr onglau mewnol mewn decagon?
\[{1260}^\circ\]
\[{1440}^\circ\]
\[{1800}^\circ\]
Beth ydy cyfanswm onglau allanol pedrochr?
\[{180}^\circ\]
Beth ydy cyfanswm onglau allanol octagon?
\[{720}^\circ\]
\[{1080}^\circ\]
Maint onglau allanol hecsagon afreolaidd ydy \({15}^\circ\), \({30}^\circ\), \({45}^\circ\), \({110}^\circ\) a \({120}^\circ\). Beth ydy maint y chweched ongl allanol?
\[{40}^\circ\]
\[{50}^\circ\]
\[{60}^\circ\]
Maint onglau mewnol pentagon afreolaidd ydy \({155}^\circ\), \({60}^\circ\), \({75}^\circ\) a \({100}^\circ\). Beth ydy maint y bumed ongl fewnol?
\[{120}^\circ\]
\[{150}^\circ\]
Beth ydy maint ongl fewnol pentagon rheolaidd?
\[{108}^\circ\]
Beth ydy maint ongl fewnol hecsagon rheolaidd?
\[{100}^\circ\]
\[{140}^\circ\]