The we know that {{MATH_5}} is {{CMD_6}}{{CMD_7}}positive{{CMD_8}}{{CMD_9}}negative{{CMD_10}}{{CMD_11}}zero{{CMD_12}}{{CMD_13}}. Also {{MATH_14}} is {{CMD_15}}{{CMD_16}}positive{{CMD_17}}{{CMD_18}}negative{{CMD_19}}{{CMD_20}}zero{{CMD_21}}{{CMD_22}} and {{MATH_23}} is {{CMD_24}}{{CMD_25}}positive{{CMD_26}}{{CMD_27}}negative{{CMD_28}}{{CMD_29}}zero{{CMD_30}}{{CMD_31}}. {{CMD_32}} Recall: {{MATH_33}}. This gives signed area. {{CMD_34}} {{CMD_35}} Recall: {{MATH_36}}. This gives signed area.{{CMD_37}}