True or false the base of a triangular pyramid is a triangle

Is every rectangle is a parallelogram? true false

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing