Muchidzidzo chePimanyika, gonyonhatu yakarurama (right-angled triangle) imhando yegonyonhatu ine mativi maviri anosangana pamukwava une gonyo rakakura 90o. Nokumwe kutaura gonyonhatu yemutwi inodaidzwa kunzi gonyonhatu yemutwi, izvi zvichidudza gonyo re 90o rainaro.