関連ワード:
are the base angles of an isosceles triangle equal are the two base angles of an isosceles triangle equal are base angles of an isosceles triangle always equal the base angles of an isosceles triangle are equal in measure the base angles of an isosceles triangle are equal true or false base angles of an isosceles triangle are equal theorem base angles of an isosceles triangle are equal proof prove that the base angles of an isosceles triangle are equal verify experimentally that the base angles of an isosceles triangle are equal prove that bisectors of the base angles of an isosceles triangle are equal
