Every one of these shapes hands you more numbers than you need. The question is never "can you multiply?" — it's "did you pick the right lines?"
Trapezium: Height, Not Slant
The h in ½(a + b)h is the perpendicular height — the straight-up gap between the two parallel sides, measured at a right angle. It is not the slanted side, even though the slant is right there looking like an obvious length to grab. The slant is always longer than the true height, so using it inflates your answer. In the toy, the slant is offered as a decoy — leave it alone.
Kite & Rhombus: Diagonals, Not Sides
For ½ × d₁ × d₂ you need the two diagonals — the lines that join opposite corners and cross in the middle. The side lengths are not what this formula wants, even though they're the first thing you'd measure with a ruler. A rhombus can have four equal sides of 5 and still have completely different diagonals; the sides alone won't give you the area. Tap the diagonals; ignore the sides.
How to Spot Which Is Which
Two quick checks. For a trapezium, ask: "does this line go straight across the gap at a right angle?" If yes, that's your height. For a kite or rhombus, ask: "does this line run corner-to-corner through the middle?" If yes, that's a diagonal. Get into the habit of pointing at the line before you write any number down — that pause is what saves the marks.