Beth ydy perimedr y petryal canlynol?
\[{9}~{cm}\]
\[{14}~{cm}\]
\[{18}~{cm}\]
Beth ydy perimedr y siâp canlynol?
\[{20}~{cm}\]
\[{24}~{cm}\]
Beth ydy perimedr sgwâr sydd a'i ochrau yn \({6}~{cm}\)?
\[{12}~{cm}\]
\[{36}~{cm}\]
Beth ydy perimedr petryal sydd ag ochrau sy'n \({10}~{cm}\) a \({2}~{cm}\)?
\[{22}~{cm}\]
Beth ydy perimedr hanner cylch sydd â radiws \({5}~{cm}\)?
\[{25.5}~{cm}~(i~1~ll.~d.)\]
\[{25.6}~{cm}~(i~1~ll.~d.)\]
\[{25.7}~{cm}~(i~1~ll.~d.)\]
Beth ydy hyd \({x}\)?
\[{10}~{m}\]
\[{12}~{m}\]
\[{14}~{m}\]
Beth ydy hyd \({y}\)?
\[{7}~{m}\]
\[{9}~{m}\]
Beth ydy perimedr triongl ongl sgwâr sydd ag ochrau byr sy'n \({3}~{cm}\) a \({4}~{cm}\)?
\[{7}~{cm}\]
\[{34}~{m}\]
\[{44}~{m}\]
\[{48}~{m}\]