Methane (ch4) and the perchlorate ion (clo-4) are both described as tetrahedral. what does this indicate about their bond angles?

In a symmetrical tetrahedron, the four bond angles are equal to each other, with values of 109.5 degree. The H-C-H angles in CH4 and the O-Cl-0 angles in ClO4 will have values close to 109.5 degree